Slide 1 / 76. Slide 2 / 76. Slide 3 / 76. Work & Energy Multiple Choice Problems A 1,800 B 5,000 E 300,000. A Fdcos θ - μ mgd B Fdcos θ.

Size: px
Start display at page:

Download "Slide 1 / 76. Slide 2 / 76. Slide 3 / 76. Work & Energy Multiple Choice Problems A 1,800 B 5,000 E 300,000. A Fdcos θ - μ mgd B Fdcos θ."

Transcription

1 Slide 1 / 76 Work & nergy Multiple hoice Problems 1 driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate the sports car from 30 m/s to 60 m/s in 9 seconds? Slide 2 / 76 1,800 5,000 10, , ,000 2 force F is at an angle θ above the horizontal is used to pull a heavy suitcase of weight mg a distance d along a level floor at constant velocity. The coefficient of friction between the floor and the suitcase is μ. The work done by the force F is: Slide 3 / 76 Fdcos θ - μ mgd Fdcos θ -μ mgd 2Fdsin θ - μ mgd Fdcos θ - 1

2 3 force of 20 N compresses a spring with spring constant 50 N/m. How much energy is stored in the spring? Slide 4 / 76 2 J 5 J 4 J 6 J 8 J 4 stone is dropped from the edge of a cliff. Which of the following graphs best represents the stone's kinetic energy K as a function of time t? Slide 5 / kg ball is attached to a 1.5 m long string and whirled in a horizontal circle at a constant speed of 5 m/s. How much work is done on the ball during one period Slide 6 / 76 9 J 4.5 J zero 2 J 8 J

3 6 student pushes a box across a horizontal surface at a constant speed of 0.6 m/s. The box has a mass of 40 kg, and the coefficient of kinetic friction is 0.5. The power supplied to the box by the person is Slide 7 / W 60 W 150 W 120 W 200 W 7 force F is applied in horizontal to a 10 kg block. The block moves at a constant speed 2 m/s across a horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.5. The work done by the force F in 1.5 minutes is: Slide 8 / J 5000 J 3000 J 2000 J 1000 J 8 ball swings from point 1 to point 3. ssuming the ball is in SHM and point 3 is 2 m above the lowest point 2. nswer the following questions. What happens to the kinetic energy of the ball when it moves from point 1 to point 2? Slide 9 / 76 increases decreases remains the same zero more information is required

4 9 ball swings from point 1 to point 3. ssuming the ball is in SHM and point 3 is 2 m above the lowest point 2. nswer the following questions. What is the velocity of the ball at the lowest point 2? Slide 10 / m/s 3.5 m/s 4.7 m/s 5.1 m/s 6.3 m/s 10 block with a mass of m slides at a constant velocity V 0 on a horizontal frictionless surface. The block collides with a spring and comes to rest when the spring is compressed to the maximum value. If the spring constant is K, what is the maximum compression in the spring? Slide 11 / 76 V 0 (m/k) 1/2 KmV 0 V 0 K/m m V 0 /K V 0 (K/m) 1/2 F (V 0 m/k) 1/ kg block released from rest from the top of an incline plane. There is no friction between the block and the surface. How much work is done by the gravitational force on the block? Slide 12 / J 60 J 50 J 40 J 30 J

5 12 2 kg block released from rest from the top of an incline plane. There is no friction between the block and the surface. What is the speed of the block when it reaches the horizontal surface? Slide 13 / m/s 4.3 m/s 5.8 m/s 7.7 m/s 6.6 m/s 13 crane lifts a 300 kg load at a constant speed to the top of a building 60 m high in 15 s. The average power expended by the crane to overcome gravity is: Slide 14 / 76 10,000 W 12,000 W 15,000 W 30,000 W 60,000 W 14 satellite with a mass m revolves around arth in a circular orbit with a constant radius R. What is the kinetic energy of the satellite if arth s mass is M? Slide 15 / 76 ½ mv mgh ½GMm/R 2 ½ GMm/R 2Mm/R

6 15 n apple of mass m is thrown in horizontal from the edge of a cliff with a height of H. What is the total mechanical energy of the apple with respect to the ground when it is at the edge of the cliff? Slide 16 / /2mv 0 mgh ½ mv mgh 2 mgh - ½ mv 0 2 mgh + ½ mv 0 16 n apple of mass m is thrown in horizontal from the edge of a cliff with a height of H. What is the kinetic energy of the apple just before it hits the ground? Slide 17 / 76 ½ mv mgh ½ mv mgh mgh 2 ½ mv 0 2 mgh - 1/2 mv kg roller coaster car starts from rest at point and moves down the curved track. Ignore any energy loss due to friction. Find the speed of the car at the lowest point. Slide 18 / m/s 20 m/s 30 m/s 40 m/s 50 m/s

7 kg roller coaster car starts from rest at point and moves down the curved track. Ignore any energy loss due to friction. Find the speed of the car when it reaches point. Slide 19 / m/s 20 m/s 30 m/s 40 m/s 50 m/s 19 Two projectiles and are launched from the ground with velocities of 50 m/s at 60 and 50 m/s at 30 with respect to the horizontal. ssuming there is no air resistance involved, which projectile has greater kinetic energy when it reaches the highest point? Slide 20 / 76 projectile projectile they both have the same none zero kinetic energy they both have zero kinetic energy at the highest point more information is required 20 n object with a mass of 2 kg is initially at rest at a position x = 0. non-constant force F is applied to the object over 6 meters. What is the total work done on the object? Slide 21 / J 150 J 170 J 190 J 180 J

8 21 n object with a mass of 2 kg is initially at rest at a position x=0. non-constant force F is applied to the object over 6 meters. What is the velocity of the object at 6 meters? Slide 22 / m/s 25 m/s 300 m/s m/s not enough information 22 metal ball is held stationary at a height h 0 above the floor and then thrown upward. ssuming the collision with the floor is elastic, which graph best shows the relationship between the total energy of the metal ball and its height h with respect to the floor? Slide 23 / toy car travels with speed v o at point x. Point Y is a height H below point x. ssuming there is no frictional losses and no work is done by a motor, what is the speed at point Y? Slide 24 / 76 (2gH+1/2v 2 o ) 1/2 v o -2gH (2gH + v 2 o ) 1/2 2gH+(1/2v 2 o ) 1/2 v o +2gH

9 24 rocker is launched from the surface of a planet with mass M and radius R. What is the minimum velocity the rocket must be given to completely escape from the planet's gravitational field? Slide 25 / 76 (2GM/R) 1/2 (2GM/R) 1/2 (GM/R) 1/2 2GM/R 2GM/16R 2 25 block of mass m is placed on a frictionless inclined plane with an incline angle θ. The block is just in contact with a free end of an unstretched spring with a spring constant k. If the block is released from rest, what is the maximum compression in the spring? Slide 26 / 76 kmg sinθ kmg cosθ 2mg sinθ/k mg/k kmg 26 In a physics lab a student uses three light frictionless PSO lab carts. ach cart is loaded with some blocks, each having the same mass. The same force F is applied to each cart and they move equal distances d. In which on of these three cases is more work done by force F? Slide 27 / 76 cart I cart II cart III the same work is done on each more information is required

10 27 In a physics lab a student uses three light frictionless PSO lab carts. ach cart is loaded with some blocks, each having the same mass. The same force F is applied to each cart and they move equal distances d. Which cart will have more kinetic energy at the end of distance d? Slide 28 / 76 cart I cart II cart III all three will have the same kinetic energy more information is required 28 In a physics lab a student uses three light frictionless PSO lab carts. ach cart is loaded with some blocks, each having the same mass. The same force F is applied to each cart and they move equal distances d. Which cart will move faster at the end of distance d? Slide 29 / 76 cart I cart II cart III all three will move with the same speed more information is required Slide 30 / 76

11 30 ball of mass m is fastened to a string. The ball swings in a vertical circle of radius r with the other end of the string held fixed. Neglecting air resistance, the difference between the string's tension at the bottom of the circle and at the top of the circle is: Slide 31 / 76 mg 2mg 3mg 6mg 9mg Slide 32 / 76 Work & nergy Free Response Problems kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 33 / 76 a. raw a free-body diagram and show all the applied forces. b. How much work is done by force F? c. How much work is done by the normal force? d. How much work is done by the gravitational force? e. How much work is done by the friction force? f. What is the net work done on the block? g. What is the change in kinetic energy of the block?

12 1. 50 kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 34 / 76 a. raw a free-body diagram and show all the applied forces. F N F f mg kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 35 / 76 b. How much work is done by force F? W = FΔx(os θ) W = (1000 N)(5.6 m)(os37) W = 4472 J kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 36 / 76 c. How much work is done by the normal force? 0 J

13 1. 50 kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 37 / 76 d. How much work is done by the gravitational force? 0 J kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 38 / 76 e. How much work is done by the friction force? ΣF = ma F N + FSinθ = mg F N = mg - FSinθ f = μfn f = μ(mg - FSinθ) f = (0.5)[(50kg)(9.8m/s 2 ) N Sin37 ] = N W = FΔx = (214.8 N)(5.6 m) = 1203 J kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 39 / 76 f. What is the net work done on the block? W net = F netδx = (Fsinθ-fΔx) W net = [(1000 N)(sin37 ) N)](5.6 m) W net = 2167 J

14 1. 50 kg block is pulled from rest by a force of 1000 N at 37 across a horizontal rough surface over a distance of 5.6 m. The coefficient of kinetic friction between the block and the surface is 0.5. Slide 40 / 76 g. What is the change in kinetic energy of the block? ΔK = W app - W f ΔK = 4,472J - 1,203J = 3,269J 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. a. raw a free-body diagram and show all the applied forces. b. How much work is done by force F? c. How much work is done by the normal force? Slide 41 / 76 d. How much work is done by the gravitational force? e. How much work is done by the friction force? f. What is the coefficient of kinetic friction between the sled and the surface? g. How much work is done by the net force on the sled? 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. a. raw a free-body diagram and show all the applied forces. Slide 42 / 76 F N mg F

15 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 43 / 76 b. How much work is done by force F? W = FΔx osθ W = (75 N)(15 m)(os 30 ) W = 974 J 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 44 / 76 c. How much work is done by the normal force? 0 J 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 45 / 76 d. How much work is done by the gravitational force? 0 J

16 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 46 / 76 e. How much work is done by the friction force? W f = -974 J 2. boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 47 / 76 f. What is the coefficient of kinetic friction between the sled and the surface? W = fδx W = μ(mg + FSinθ) μ = W/(mg + FSinθ)Δx μ = 974J/[(10kg)(9.8m/s 2 ) + 75Sin30 ](15m) = boy pushes a 10 kg sled at a constant speed by applying a force of 75 N at 30 with respect to the horizontal. The sled is pushed over a distance of 15 m. Slide 48 / 76 g. How much work is done by the net force on the sled? 0 J

17 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 49 / 76 a. What is the kinetic energy of the block at the bottom of the curved surface? b. What is the speed of the block at the bottom of the curved surface? c. Find the stopping distance of the block? d. Find the elapsed time of the block while it is moving on the horizontal part of the track. e. How much work is done by the friction force on the block on the horizontal part of the track? 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 50 / 76 a. What is the kinetic energy of the block at the bottom of the curved surface? 0 + W = f GP = K mgh = K K = mgh = (5kg)(9.8m/s 2 )(3.8m) K = 186J 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 51 / 76 b. What is the speed of the block at the bottom of the curved surface? K = ½mv 2 v = (2K/m) 1/2 v = (2)(186J)/5kg) 1/2 v = 8.6 m/s 2

18 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 52 / 76 c. Find the stopping distance of the block? 0 + W = f K - W = 0 K = W K = fδx Δx = K/f = K/μmg Δx = 186J/(0.02)(5kg)(9.8m/s 2 ) = 190 m 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 53 / 76 d. Find the elapsed time of the block while it is moving on the horizontal part of the track. a = F/m = -f/m v = vo + at -vo = at -vo = (- f/m)t t = vom/f t = vom/μmg t = vo/μg = (8.6m/s)/(0.2)(9.8m/s2) = 44s 3. 5 kg block is released from rest at the top of a quarter-circle type curved frictionless surface. The radius of the curvature is 3.8 m. When the block reaches the bottom of the curvature it then slides on a rough horizontal surface until it comes to rest. The coefficient of kinetic friction on the horizontal surface is Slide 54 / 76 e. How much work is done by the friction force on the block on the horizontal part of the track? 186 J

19 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. a. How much work is done by the spring on the marble? b. What is the speed of the marble at the edge of the table? c. What is the total energy of the marble at the edge of the table with respect to floor level? d. How much time it will take the marble to reach the floor level from the table? e. What is the horizontal range of the marble? Slide 55 / 76 f. What is the kinetic energy of the marble just before it strikes the floor? 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. a. How much work is done by the spring on the marble? Slide 56 / 76 W = P = ½kx 2 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. Slide 57 / 76 b. What is the speed of the marble at the edge of the table? ½KX 2 = ½mv 2 v 2 = KX 2 /m v = X(K/m) 1/2

20 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. Slide 58 / 76 c. What is the total energy of the marble at the edge of the table with respect to floor level? = ½mv 2 + mgh = ½m(KX 2 /m) + mgh = ½KX 2 + mgh 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. Slide 59 / 76 d. How much time it will take the marble to reach the floor level from the table? H = ½gt 2 t = (2H/g) 1/2 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. Slide 60 / 76 e. What is the horizontal range of the marble? R = v o t R = x(k/m) 1/2 (2H/g) 1/2 R = (2HKx 2 /mg) 1/2

21 4. Spring gun with a spring constant K is placed at the edge of a table which distance above the floor is H and the apparatus is used to shoot marbles with a certain initial speed in horizontal. The spring is initially compressed by a distance X and then released. The mass of each marble is m. Slide 61 / 76 f. What is the kinetic energy of the marble just before it strikes the floor? K = ½KX 2 + mgh 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 62 / 76 a. How much work is done on the object during first 12.5 m? b. What is the change is kinetic energy at the end of 12.5 m? c. What is the speed of the object at the end of 12.5 m? d. What is the total work done by the force for the entire trip? e. What is the change in kinetic energy for the entire trip? f. What is the speed of the object at the end of 20 m? 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 63 / 76 a. How much work is done on the object during first 12.5 m? W = area under the F vs. x graph W =½bh W =½(12.5m)(40N) W = 250J

22 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 64 / 76 b. What is the change is kinetic energy at the end of 12.5 m? ΔK = W = 250J 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 65 / 76 c. What is the speed of the object at the end of 12.5 m? K = ½mv 2 2K/m = v 2 v = (2K/m) 1/2 v = (2(250J)/5kg) 1/2 v = 10 m/s 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 66 / 76 d. What is the total work done by the force for the entire trip? W = area under the F vs. x graph W =½bh + ½bh W =½(12.5m)(40N) + ½(7.5m)(40N) W = 250J + 150J W = 400J

23 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 67 / 76 e. What is the change in kinetic energy for the entire trip? ΔK = W = 400J 5. 5 kg object is initially at rest at x 0 = 0. nonconstant force is applied to the object. The applied force as a function of position is shown on the graph. Slide 68 / 76 f. What is the speed of the object at the end of 20 m? K = ½mv 2 2K/m = v 2 v = (2K/m) 1/2 v = (2(400J)/5kg) 1/2 v = 12.6 m/s kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. a. What is the speed of the car at point? Slide 69 / 76 b. What is the speed of the car at point? c. What is the speed of the car at point? d. What is the force applied by the surface on the car at point? e. What is the force applied by the surface on the car at point? f. How far from point will the car land?

24 kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. a. What is the speed of the car at point? Slide 70 / 76 GP = K mgh = ½mv 2 gh = ½v 2 v = (2gh) 1/2 v = (2(9.8m/s 2 )(80m)) 1/2 v = 39.6 m/s kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. Slide 71 / 76 b. What is the speed of the car at point? GP = K + GP f mgh = ½mv 2 + mg2r gh = ½v 2 + g2r v 2 = 2g(H - 2r) v = (2g(H - 2r)) 1/2 v = (2(9.8m/s 2 )(80m-30m)) 1/2 v = 31.3 m/s kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. Slide 72 / 76 c. What is the speed of the car at point? GP = K + GP f mgh = ½mv 2 + mgh gh = ½v 2 + gh v 2 = 2g(H - h) v = (2g(H - h)) 1/2 v = (2(9.8m/s 2 )(80m-10m)) 1/2 v = 37.0 m/s

25 kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. Slide 73 / 76 d. What is the force applied by the surface on the car at point? F N - mg = mv 2 /r F N = mg + mv 2 /r F N = m(g + v 2 /r) F N = 900kg(9.8m/s 2 + (39.6m/s) 2 /15m) F N = 102,910N kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. e. What is the force applied by the surface on the car at point? Slide 74 / 76 F N + mg = mv 2 /r F N = mv 2 /r - mg F N = m(v 2 /r - g) F N = 900kg((39.6m/s) 2 /15m - 9.8m/s 2 ) F N = 49,961N kg roller coaster car starts from rest at point rolls down the track and then goes around a loop and when it leaves the loop flies off the inclined part of the track. ll the dimensions are: H = 80 m, r = 15 m, h = 10 m, ϴ = 30. Slide 75 / 76 f. How far from point will the car land? v0 = 37.0m/s y0 = 10m Y-direction voy = v0sinθ = 37m/s(sin30) = 18.5m/s y = y0 +voyt + ½gt 2 y = 10m +(18.5m/s)t + (-4.9m/s 2 )t 2 t = 4.3s X-direction vox = 37m/s(cos30) = 32.2m/s x = x0 +voxt + ½at 2 x = voxt x = (32.2m/s)(4.3s) x = 138.5m

26 Slide 76 / 76

Slide 2 / 76. Slide 1 / 76. Slide 3 / 76. Slide 4 / 76. Slide 6 / 76. Slide 5 / 76. Work & Energy Multiple Choice Problems A 1,800 B 5,000 E 300,000

Slide 2 / 76. Slide 1 / 76. Slide 3 / 76. Slide 4 / 76. Slide 6 / 76. Slide 5 / 76. Work & Energy Multiple Choice Problems A 1,800 B 5,000 E 300,000 Slide 1 / 76 Slide 2 / 76 1 driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate the sports car from 30 m/s to

More information

Slide 1 / 76. Work & Energy Multiple Choice Problems

Slide 1 / 76. Work & Energy Multiple Choice Problems Slide 1 / 76 Work & Energy Multiple Choice Problems Slide 2 / 76 1 A driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to

More information

PSI AP Physics I Work and Energy

PSI AP Physics I Work and Energy PSI AP Physics I Work and Energy Multiple-Choice questions 1. A driver in a 2000 kg Porsche wishes to pass a slow moving school bus on a 4 lane road. What is the average power in watts required to accelerate

More information

(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m

(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m PSI AP Physics C Work and Energy (Algebra Based) Multiple Choice Questions (use g = 10 m/s 2 ) 1. A student throws a ball upwards from the ground level where gravitational potential energy is zero. At

More information

AP Physics C Summer Assignment Kinematics

AP Physics C Summer Assignment Kinematics AP Physics C Summer Assignment Kinematics 1. A car whose speed is 20 m/s passes a stationary motorcycle which immediately gives chase with a constant acceleration of 2.4 m/s 2. a. How far will the motorcycle

More information

(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m

(A) 10 m (B) 20 m (C) 25 m (D) 30 m (E) 40 m Work/nergy 1. student throws a ball upward where the initial potential energy is 0. t a height of 15 meters the ball has a potential energy of 60 joules and is moving upward with a kinetic energy of 40

More information

Multiple-Choice questions

Multiple-Choice questions AP Physics I Work and Energy Multiple-Choice questions 1. A force F is at an angle θ above the horizontal and is used to pull a heavy suitcase of weight mg a distance d along a level floor at constant

More information

AP Physics C. Work and Energy. Free-Response Problems. (Without Calculus)

AP Physics C. Work and Energy. Free-Response Problems. (Without Calculus) AP Physics C Work and Energy Free-Response Problems (Without Calculus) 1. A block with a mass m =10 kg is released from rest and slides a distance d = 5 m down a frictionless plane inclined at an angle

More information

Conservation of Energy Challenge Problems Problem 1

Conservation of Energy Challenge Problems Problem 1 Conservation of Energy Challenge Problems Problem 1 An object of mass m is released from rest at a height h above the surface of a table. The object slides along the inside of the loop-the-loop track consisting

More information

Work and Energy Chapter Questions. 2. Contrast the effects of external forces and internal forces on the total energy of a system.

Work and Energy Chapter Questions. 2. Contrast the effects of external forces and internal forces on the total energy of a system. PSI AP Physics I Work and Energy Chapter Questions 1. Define a system, the environment and the system boundary. 2. Contrast the effects of external forces and internal forces on the total energy of a system.

More information

2 possibilities. 2.) Work is done and... 1.) Work is done and... *** The function of work is to change energy ***

2 possibilities. 2.) Work is done and... 1.) Work is done and... *** The function of work is to change energy *** Work-Energy Theorem and Energy Conservation *** The function of work is to change energy *** 2 possibilities 1.) Work is done and... or 2.) Work is done and... 1 EX: A 100 N box is 10 m above the ground

More information

1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B km C. 25 km D. 45 km E. 50 km

1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B km C. 25 km D. 45 km E. 50 km Name: Physics I Mid Term Exam Review Multiple Choice Questions Date: Mr. Tiesler 1. A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? A. 10 km B. 22.5 km C. 25 km D. 45 km

More information

Old Exams Questions Ch. 8 T072 Q2.: Q5. Q7.

Old Exams Questions Ch. 8 T072 Q2.: Q5. Q7. Old Exams Questions Ch. 8 T072 Q2.: A ball slides without friction around a loop-the-loop (see Fig 2). A ball is released, from rest, at a height h from the left side of the loop of radius R. What is the

More information

Exam #2, Chapters 5-7 PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Exam #2, Chapters 5-7 PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Exam #2, Chapters 5-7 Name PHYS 101-4M MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The quantity 1/2 mv2 is A) the potential energy of the object.

More information

Chapter 6 Energy and Oscillations

Chapter 6 Energy and Oscillations Chapter 6 Energy and Oscillations Conservation of Energy In this chapter we will discuss one of the most important and fundamental principles in the universe. Energy is conserved. This means that in any

More information

Potential Energy & Conservation of Energy

Potential Energy & Conservation of Energy PHYS 101 Previous Exam Problems CHAPTER 8 Potential Energy & Conservation of Energy Potential energy Conservation of energy conservative forces Conservation of energy friction Conservation of energy external

More information

Base your answers to questions 5 and 6 on the information below.

Base your answers to questions 5 and 6 on the information below. 1. A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second

More information

Regents Physics. Physics Midterm Review - Multiple Choice Problems

Regents Physics. Physics Midterm Review - Multiple Choice Problems Name Physics Midterm Review - Multiple Choice Problems Regents Physics 1. A car traveling on a straight road at 15.0 meters per second accelerates uniformly to a speed of 21.0 meters per second in 12.0

More information

https://njctl.org/courses/science/ap-physics-c-mechanics/attachments/summerassignment-3/

https://njctl.org/courses/science/ap-physics-c-mechanics/attachments/summerassignment-3/ AP Physics C Summer Assignment 2017 1. Complete the problem set that is online, entitled, AP C Physics C Summer Assignment 2017. I also gave you a copy of the problem set. You may work in groups as a matter

More information

Slide 1 / A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? 10 km 22.5 km 25 km 45 km 50 km

Slide 1 / A train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? 10 km 22.5 km 25 km 45 km 50 km Slide 1 / 96 1 train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? 10 km 22.5 km 25 km 45 km 50 km Slide 2 / 96 2 bicyclist moves at a constant speed of 6 m/s. How long it will

More information

PSI AP Physics B Dynamics

PSI AP Physics B Dynamics PSI AP Physics B Dynamics Multiple-Choice questions 1. After firing a cannon ball, the cannon moves in the opposite direction from the ball. This an example of: A. Newton s First Law B. Newton s Second

More information

Physics Midterm Review KEY

Physics Midterm Review KEY Name: Date: 1. Which quantities are scalar? A. speed and work B. velocity and force C. distance and acceleration D. momentum and power 2. A 160.-kilogram space vehicle is traveling along a straight line

More information

2. What would happen to his acceleration if his speed were half? Energy The ability to do work

2. What would happen to his acceleration if his speed were half? Energy The ability to do work 1. A 40 kilogram boy is traveling around a carousel with radius 0.5 meters at a constant speed of 1.7 meters per second. Calculate his centripetal acceleration. 2. What would happen to his acceleration

More information

Physics Test Review: Mechanics Session: Name:

Physics Test Review: Mechanics Session: Name: Directions: For each statement or question, write in the answer box, the number of the word or expression that, of those given, best completes the statement or answers the question. 1. The diagram below

More information

Review. Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91

Review. Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91 Review Kinetic Energy Work Hooke s s Law Potential Energy Conservation of Energy Power 1/91 The unit of work is the A. Newton B. Watt C. Joule D. Meter E. Second 2/91 The unit of work is the A. Newton

More information

Phys101 Second Major-162 Zero Version Coordinator: Dr. Kunwar S. Saturday, March 25, 2017 Page: N Ans:

Phys101 Second Major-162 Zero Version Coordinator: Dr. Kunwar S. Saturday, March 25, 2017 Page: N Ans: Coordinator: Dr. Kunwar S. Saturday, March 25, 2017 Page: 1 Q1. Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 20 N, acting due east, and the other

More information

Momentum & Energy Review Checklist

Momentum & Energy Review Checklist Momentum & Energy Review Checklist Impulse and Momentum 3.1.1 Use equations to calculate impulse; momentum; initial speed; final speed; force; or time. An object with a mass of 5 kilograms is moving at

More information

Physics 23 Exam 2 March 3, 2009

Physics 23 Exam 2 March 3, 2009 Use the following to answer question 1: A stationary 4-kg shell explodes into three pieces. Two of the fragments have a mass of 1 kg each and move along the paths shown with a speed of 10 m/s. The third

More information

Friction is always opposite to the direction of motion.

Friction is always opposite to the direction of motion. 6. Forces and Motion-II Friction: The resistance between two surfaces when attempting to slide one object across the other. Friction is due to interactions at molecular level where rough edges bond together:

More information

(35+70) 35 g (m 1+m 2)a=m1g a = 35 a= =3.27 g 105

(35+70) 35 g (m 1+m 2)a=m1g a = 35 a= =3.27 g 105 Coordinator: Dr. W. L-Basheer Monday, March 16, 2015 Page: 1 Q1. 70 N block and a 35 N block are connected by a massless inextendable string which is wrapped over a frictionless pulley as shown in Figure

More information

v (m/s) 10 d. displacement from 0-4 s 28 m e. time interval during which the net force is zero 0-2 s f. average velocity from 0-4 s 7 m/s x (m) 20

v (m/s) 10 d. displacement from 0-4 s 28 m e. time interval during which the net force is zero 0-2 s f. average velocity from 0-4 s 7 m/s x (m) 20 Physics Final Exam Mechanics Review Answers 1. Use the velocity-time graph below to find the: a. velocity at 2 s 6 m/s v (m/s) 1 b. acceleration from -2 s 6 c. acceleration from 2-4 s 2 m/s 2 2 4 t (s)

More information

Mechanics II. Which of the following relations among the forces W, k, N, and F must be true?

Mechanics II. Which of the following relations among the forces W, k, N, and F must be true? Mechanics II 1. By applying a force F on a block, a person pulls a block along a rough surface at constant velocity v (see Figure below; directions, but not necessarily magnitudes, are indicated). Which

More information

AP Physics C. Momentum. Free Response Problems

AP Physics C. Momentum. Free Response Problems AP Physics C Momentum Free Response Problems 1. A bullet of mass m moves at a velocity v 0 and collides with a stationary block of mass M and length L. The bullet emerges from the block with a velocity

More information

(1) +0.2 m/s (2) +0.4 m/s (3) +0.6 m/s (4) +1 m/s (5) +0.8 m/s

(1) +0.2 m/s (2) +0.4 m/s (3) +0.6 m/s (4) +1 m/s (5) +0.8 m/s 77777 77777 Instructor: Biswas/Ihas/Whiting PHYSICS DEPARTMENT PHY 2053 Exam 2, 120 minutes November 13, 2009 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized

More information

Page 1. Name: Section This assignment is due at the first class in 2019 Part I Show all work!

Page 1. Name: Section This assignment is due at the first class in 2019 Part I Show all work! Name: Section This assignment is due at the first class in 2019 Part I Show all work! 7164-1 - Page 1 1) A car travels at constant speed around a section of horizontal, circular track. On the diagram provided

More information

Physics 201, Midterm Exam 2, Fall Answer Key

Physics 201, Midterm Exam 2, Fall Answer Key Physics 201, Midterm Exam 2, Fall 2006 Answer Key 1) A constant force is applied to a body that is already moving. The force is directed at an angle of 60 degrees to the direction of the body s velocity.

More information

1 A car moves around a circular path of a constant radius at a constant speed. Which of the following statements is true?

1 A car moves around a circular path of a constant radius at a constant speed. Which of the following statements is true? Slide 1 / 30 1 car moves around a circular path of a constant radius at a constant speed. Which of the following statements is true? The car s velocity is constant The car s acceleration is constant The

More information

AP Physics C: Mechanics Practice (Systems of Particles and Linear Momentum)

AP Physics C: Mechanics Practice (Systems of Particles and Linear Momentum) AP Physics C: Mechanics Practice (Systems of Particles and Linear Momentum) 1980M2. A block of mass m slides at velocity v o across a horizontal frictionless surface toward a large curved movable ramp

More information

AP Physics First Nine Weeks Review

AP Physics First Nine Weeks Review AP Physics First Nine Weeks Review 1. If F1 is the magnitude of the force exerted by the Earth on a satellite in orbit about the Earth and F2 is the magnitude of the force exerted by the satellite on the

More information

frictionless horizontal surface. The bullet penetrates the block and emerges with a velocity of o

frictionless horizontal surface. The bullet penetrates the block and emerges with a velocity of o AP Physics Free Response Practice Momentum and Impulse 1976B2. A bullet of mass m and velocity v o is fired toward a block of mass 4m. The block is initially at rest on a v frictionless horizontal surface.

More information

Period: Date: Review - UCM & Energy. Page 1. Base your answers to questions 1 and 2 on the information and diagram below.

Period: Date: Review - UCM & Energy. Page 1. Base your answers to questions 1 and 2 on the information and diagram below. Base your answers to questions 1 and 2 on the information and diagram below. The diagram shows the top view of a -kilogram student at point A on an amusement park ride. The ride spins the student in a

More information

1. (P2.1A) The picture below shows a ball rolling along a table at 1 second time intervals. What is the object s average velocity after 6 seconds?

1. (P2.1A) The picture below shows a ball rolling along a table at 1 second time intervals. What is the object s average velocity after 6 seconds? PHYSICS FINAL EXAM REVIEW FIRST SEMESTER (01/2017) UNIT 1 Motion P2.1 A Calculate the average speed of an object using the change of position and elapsed time. P2.1B Represent the velocities for linear

More information

Momentum & Energy Review Checklist

Momentum & Energy Review Checklist Momentum & Energy Review Checklist Impulse and Momentum 3.1.1 Use equations to calculate impulse; momentum; initial speed; final speed; force; or time. An object with a mass of 5 kilograms is moving at

More information

KINETIC ENERGY AND WORK

KINETIC ENERGY AND WORK Chapter 7: KINETIC ENERGY AND WORK 1 Which of the following is NOT a correct unit for work? A erg B ft lb C watt D newton meter E joule 2 Which of the following groups does NOT contain a scalar quantity?

More information

AP Physics C - Mechanics

AP Physics C - Mechanics Slide 1 / 84 Slide 2 / 84 P Physics C - Mechanics Energy Problem Solving Techniques 2015-12-03 www.njctl.org Table of Contents Slide 3 / 84 Introduction Gravitational Potential Energy Problem Solving GPE,

More information

Physics 103, Practice Midterm Exam 2

Physics 103, Practice Midterm Exam 2 Physics 103, Practice Midterm Exam 2 1) A rock of mass m is whirled in a horizontal circle on a string of length L. The period of its motion is T seconds. If the length of the string is increased to 4L

More information

An object moves back and forth, as shown in the position-time graph. At which points is the velocity positive?

An object moves back and forth, as shown in the position-time graph. At which points is the velocity positive? 1 The slope of the tangent on a position-time graph equals the instantaneous velocity 2 The area under the curve on a velocity-time graph equals the: displacement from the original position to its position

More information

PHYS 101 Previous Exam Problems. Kinetic Energy and

PHYS 101 Previous Exam Problems. Kinetic Energy and PHYS 101 Previous Exam Problems CHAPTER 7 Kinetic Energy and Work Kinetic energy Work Work-energy theorem Gravitational work Work of spring forces Power 1. A single force acts on a 5.0-kg object in such

More information

A. B. C. D. E. v x. ΣF x

A. B. C. D. E. v x. ΣF x Q4.3 The graph to the right shows the velocity of an object as a function of time. Which of the graphs below best shows the net force versus time for this object? 0 v x t ΣF x ΣF x ΣF x ΣF x ΣF x 0 t 0

More information

1. A sphere with a radius of 1.7 cm has a volume of: A) m 3 B) m 3 C) m 3 D) 0.11 m 3 E) 21 m 3

1. A sphere with a radius of 1.7 cm has a volume of: A) m 3 B) m 3 C) m 3 D) 0.11 m 3 E) 21 m 3 1. A sphere with a radius of 1.7 cm has a volume of: A) 2.1 10 5 m 3 B) 9.1 10 4 m 3 C) 3.6 10 3 m 3 D) 0.11 m 3 E) 21 m 3 2. A 25-N crate slides down a frictionless incline that is 25 above the horizontal.

More information

RELEASED. Go to next page. 2. The graph shows the acceleration of a car over time.

RELEASED. Go to next page. 2. The graph shows the acceleration of a car over time. 1. n object is launched across a room. How can a student determine the average horizontal velocity of the object using a meter stick and a calculator? The student can calculate the object s initial potential

More information

Old Exam. Question Chapter 7 072

Old Exam. Question Chapter 7 072 Old Exam. Question Chapter 7 072 Q1.Fig 1 shows a simple pendulum, consisting of a ball of mass M = 0.50 kg, attached to one end of a massless string of length L = 1.5 m. The other end is fixed. If the

More information

The graph shows how an external force applied to an object of mass 2.0 kg varies with time. The object is initially at rest.

The graph shows how an external force applied to an object of mass 2.0 kg varies with time. The object is initially at rest. T2-2 [195 marks] 1. The graph shows how an external force applied to an object of mass 2.0 kg varies with time. The object is initially at rest. What is the speed of the object after 0.60 s? A. 7.0 ms

More information

The content contained in all sections of chapter 6 of the textbook is included on the AP Physics B exam.

The content contained in all sections of chapter 6 of the textbook is included on the AP Physics B exam. WORK AND ENERGY PREVIEW Work is the scalar product of the force acting on an object and the displacement through which it acts. When work is done on or by a system, the energy of that system is always

More information

Physics 1A, Summer 2011, Summer Session 1 Quiz 3, Version A 1

Physics 1A, Summer 2011, Summer Session 1 Quiz 3, Version A 1 Physics 1A, Summer 2011, Summer Session 1 Quiz 3, Version A 1 Closed book and closed notes. No work needs to be shown. 1. Three rocks are thrown with identical speeds from the top of the same building.

More information

Physics 231. Topic 5: Energy and Work. Alex Brown October 2, MSU Physics 231 Fall

Physics 231. Topic 5: Energy and Work. Alex Brown October 2, MSU Physics 231 Fall Physics 231 Topic 5: Energy and Work Alex Brown October 2, 2015 MSU Physics 231 Fall 2015 1 What s up? (Friday Sept 26) 1) The correction exam is now open. The exam grades will be sent out after that on

More information

pg B7. A pendulum consists of a small object of mass m fastened to the end of an inextensible cord of length L. Initially, the pendulum is dra

pg B7. A pendulum consists of a small object of mass m fastened to the end of an inextensible cord of length L. Initially, the pendulum is dra pg 165 A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x

More information

Practice Exam 2. Name: Date: ID: A. Multiple Choice Identify the choice that best completes the statement or answers the question.

Practice Exam 2. Name: Date: ID: A. Multiple Choice Identify the choice that best completes the statement or answers the question. Name: Date: _ Practice Exam 2 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A roller-coaster car has a mass of 500 kg when fully loaded with passengers.

More information

WEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved

WEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved 1. A 1-kilogram rock is dropped from a cliff 90 meters high. After falling 20 meters, the kinetic energy of the rock is approximately 1. 20 J 2. 200 J 3. 700 J 4. 900 J 2. If the speed of a car is doubled,

More information

D) No, because of the way work is defined D) remains constant at zero. D) 0 J D) zero

D) No, because of the way work is defined D) remains constant at zero. D) 0 J D) zero CHAPTER 6 REVIEW NAME 1) Can work be done on a system if there is no motion? A) Yes, if an outside force is provided. B) Yes, since motion is only relative. C) No, since a system which is not moving has

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Diagram 1 A) B - A. B) A - B. C) A + B. D) A B.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Diagram 1 A) B - A. B) A - B. C) A + B. D) A B. Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In the diagram shown, the unknown vector is 1) Diagram 1 A) B - A. B) A - B. C) A + B.

More information

B C = B 2 + C 2 2BC cosθ = (5.6)(4.8)cos79 = ) The components of vectors B and C are given as follows: B x. = 6.

B C = B 2 + C 2 2BC cosθ = (5.6)(4.8)cos79 = ) The components of vectors B and C are given as follows: B x. = 6. 1) The components of vectors B and C are given as follows: B x = 6.1 C x = 9.8 B y = 5.8 C y = +4.6 The angle between vectors B and C, in degrees, is closest to: A) 162 B) 111 C) 69 D) 18 E) 80 B C = (

More information

Kinematics. v (m/s) ii. Plot the velocity as a function of time on the following graph.

Kinematics. v (m/s) ii. Plot the velocity as a function of time on the following graph. Kinematics 1993B1 (modified) A student stands in an elevator and records his acceleration as a function of time. The data are shown in the graph above. At time t = 0, the elevator is at displacement x

More information

Energy Problem Solving Techniques.

Energy Problem Solving Techniques. 1 Energy Problem Solving Techniques www.njctl.org 2 Table of Contents Introduction Gravitational Potential Energy Problem Solving GPE, KE and EPE Problem Solving Conservation of Energy Problem Solving

More information

PRACTICE TEST for Midterm Exam

PRACTICE TEST for Midterm Exam South Pasadena AP Physics PRACTICE TEST for Midterm Exam FORMULAS Name Period Date / / d = vt d = v o t + ½ at 2 d = v o + v 2 t v = v o + at v 2 = v 2 o + 2ad v = v x 2 + v y 2 = tan 1 v y v v x = v cos

More information

Physics 20 Practice Problems for Exam 1 Fall 2014

Physics 20 Practice Problems for Exam 1 Fall 2014 Physics 20 Practice Problems for Exam 1 Fall 2014 Multiple Choice Short Questions (1 pt ea.) Circle the best answer. 1. An apple falls from a tree and hits the ground 5 meters below. It hits the ground

More information

Practice Test for Midterm Exam

Practice Test for Midterm Exam A.P. Physics Practice Test for Midterm Exam Kinematics 1. Which of the following statements are about uniformly accelerated motion? Select two answers. a) If an object s acceleration is constant then it

More information

Lecture 10 Mechanical Energy Conservation; Power

Lecture 10 Mechanical Energy Conservation; Power Potential energy Basic energy Lecture 10 Mechanical Energy Conservation; Power ACT: Zero net work The system of pulleys shown below is used to lift a bag of mass M at constant speed a distance h from the

More information

Momentum, Impulse, Work, Energy, Power, and Conservation Laws

Momentum, Impulse, Work, Energy, Power, and Conservation Laws Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.

More information

5. Use the graph below to determine the displacement of the object at the end of the first seven seconds.

5. Use the graph below to determine the displacement of the object at the end of the first seven seconds. Name: Hour: 1. The slope of the tangent on a position-time graph equals the: Sem 1 Exam Review Advanced Physics 2015-2016 2. The area under the curve on a velocity-time graph equals the: 3. The graph below

More information

Momentum, Impulse, Work, Energy, Power, and Conservation Laws

Momentum, Impulse, Work, Energy, Power, and Conservation Laws Momentum, Impulse, Work, Energy, Power, and Conservation Laws 1. Cart A has a mass of 2 kilograms and a speed of 3 meters per second. Cart B has a mass of 3 kilograms and a speed of 2 meters per second.

More information

WEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved

WEP-Energy. 2. If the speed of a car is doubled, the kinetic energy of the car is 1. quadrupled 2. quartered 3. doubled 4. halved 1. A 1-kilogram rock is dropped from a cliff 90 meters high. After falling 20 meters, the kinetic energy of the rock is approximately 1. 20 J 2. 200 J 3. 700 J 4. 900 J 2. If the speed of a car is doubled,

More information

PSI AP Physics B Circular Motion

PSI AP Physics B Circular Motion PSI AP Physics B Circular Motion Multiple Choice 1. A ball is fastened to a string and is swung in a vertical circle. When the ball is at the highest point of the circle its velocity and acceleration directions

More information

The diagram below shows a block on a horizontal frictionless surface. A 100.-newton force acts on the block at an angle of 30. above the horizontal.

The diagram below shows a block on a horizontal frictionless surface. A 100.-newton force acts on the block at an angle of 30. above the horizontal. Name: 1) 2) 3) Two students are pushing a car. What should be the angle of each student's arms with respect to the flat ground to maximize the horizontal component of the force? A) 90 B) 0 C) 30 D) 45

More information

PHYSICS 221, FALL 2010 EXAM #1 Solutions WEDNESDAY, SEPTEMBER 29, 2010

PHYSICS 221, FALL 2010 EXAM #1 Solutions WEDNESDAY, SEPTEMBER 29, 2010 PHYSICS 1, FALL 010 EXAM 1 Solutions WEDNESDAY, SEPTEMBER 9, 010 Note: The unit vectors in the +x, +y, and +z directions of a right-handed Cartesian coordinate system are î, ĵ, and ˆk, respectively. In

More information

1. Which one of the following situations is an example of an object with a non-zero kinetic energy?

1. Which one of the following situations is an example of an object with a non-zero kinetic energy? Name: Date: 1. Which one of the following situations is an example of an object with a non-zero kinetic energy? A) a drum of diesel fuel on a parked truck B) a stationary pendulum C) a satellite in geosynchronous

More information

Lecture 18. Newton s Laws

Lecture 18. Newton s Laws Agenda: l Review for exam Lecture 18 l Assignment: For Monday, Read chapter 14 Physics 207: Lecture 18, Pg 1 Newton s Laws Three blocks are connected on the table as shown. The table has a coefficient

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. PH 105 Exam 2 VERSION A Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Is it possible for a system to have negative potential energy? A)

More information

i. Indicate on the figure the point P at which the maximum speed of the car is attained. ii. Calculate the value vmax of this maximum speed.

i. Indicate on the figure the point P at which the maximum speed of the car is attained. ii. Calculate the value vmax of this maximum speed. 1. A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x = 0

More information

CPS lesson Work and Energy ANSWER KEY

CPS lesson Work and Energy ANSWER KEY CPS lesson Work and Energy ANSWER KEY 1. A ball feeder slowly pushes a bowling ball up a 1-m ramp to a height of 0.5 m above the floor. Neglecting friction, what constant force must be exerted on the 5-kg

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. PH 105 Exam 2 VERSION B Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A boy throws a rock with an initial velocity of 2.15 m/s at 30.0 above

More information

Kinematics and Dynamics

Kinematics and Dynamics AP PHYS 1 Test Review Kinematics and Dynamics Name: Other Useful Site: http://www.aplusphysics.com/ap1/ap1- supp.html 2015-16 AP Physics: Kinematics Study Guide The study guide will help you review all

More information

AP Physics. Chapters 7 & 8 Review

AP Physics. Chapters 7 & 8 Review AP Physics Chapters 7 & 8 Review 1.A particle moves along the x axis and is acted upon by a single conservative force given by F x = ( 20 4.0x)N where x is in meters. The potential energy associated with

More information

Extra credit assignment #4 It can be handed in up until one class before Test 4 (check your course outline). It will NOT be accepted after that.

Extra credit assignment #4 It can be handed in up until one class before Test 4 (check your course outline). It will NOT be accepted after that. Extra credit assignment #4 It can be handed in up until one class before Test 4 (check your course outline). It will NOT be accepted after that. NAME: 4. Units of power include which of the following?

More information

Practice Exam 2. Multiple Choice Identify the choice that best completes the statement or answers the question.

Practice Exam 2. Multiple Choice Identify the choice that best completes the statement or answers the question. Practice Exam 2 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A roller-coaster car has a mass of 500.0 kg when fully loaded with passengers. At the bottom

More information

Midterm Review. January 07, Grade:«11-12» Subject:Honors Physics. Date:«1/7-1/8 2015»

Midterm Review. January 07, Grade:«11-12» Subject:Honors Physics. Date:«1/7-1/8 2015» Midterm Review 1 train moves at a constant velocity of 90 km/h. How far will it move in 0.25 h? Grade:«11-12» Subject:Honors Physics ate:«1/7-1/8 2015» 10 km 22.5 km 25 km 45 km 50 km 2 bicyclist moves

More information

3. How long must a 100 N net force act to produce a change in momentum of 200 kg m/s? (A) 0.25 s (B) 0.50 s (C) 1.0 s (D) 2.0 s (E) 4.

3. How long must a 100 N net force act to produce a change in momentum of 200 kg m/s? (A) 0.25 s (B) 0.50 s (C) 1.0 s (D) 2.0 s (E) 4. AP Physics Multiple Choice Practice Momentum and Impulse 1. A car of mass m, traveling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass,

More information

AP1 WEP. Answer: E. The final velocities of the balls are given by v = 2gh.

AP1 WEP. Answer: E. The final velocities of the balls are given by v = 2gh. 1. Bowling Ball A is dropped from a point halfway up a cliff. A second identical bowling ball, B, is dropped simultaneously from the top of the cliff. Comparing the bowling balls at the instant they reach

More information

PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009

PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009 PHYSICS 221, FALL 2009 EXAM #1 SOLUTIONS WEDNESDAY, SEPTEMBER 30, 2009 Note: The unit vectors in the +x, +y, and +z directions of a right-handed Cartesian coordinate system are î, ĵ, and ˆk, respectively.

More information

In this lecture we will discuss three topics: conservation of energy, friction, and uniform circular motion.

In this lecture we will discuss three topics: conservation of energy, friction, and uniform circular motion. 1 PHYS:100 LECTURE 9 MECHANICS (8) In this lecture we will discuss three topics: conservation of energy, friction, and uniform circular motion. 9 1. Conservation of Energy. Energy is one of the most fundamental

More information

1 In the absence of a net force, a moving object will. slow down and eventually stop stop immediately turn right move with constant velocity turn left

1 In the absence of a net force, a moving object will. slow down and eventually stop stop immediately turn right move with constant velocity turn left Slide 1 / 51 1 In the absence of a net force, a moving object will slow down and eventually stop stop immediately turn right move with constant velocity turn left Slide 2 / 51 2 When a cat sleeps on a

More information

4.) A baseball that weighs 1.6 N leaves a bat with a speed of 40.0 m/s. Calculate the kinetic energy of the ball. 130 J

4.) A baseball that weighs 1.6 N leaves a bat with a speed of 40.0 m/s. Calculate the kinetic energy of the ball. 130 J AP Physics-B Energy And Its Conservation Introduction: Energy is a term that most of us take for granted and use quite freely. We assume we know what we are talking about when speaking of energy. In truth,

More information

RELEASED FORM RELEASED. North Carolina Test of Physics

RELEASED FORM RELEASED. North Carolina Test of Physics Name Physics Form North arolina Test of Physics RELESE Public Schools of North arolina www.ncpublicschools.org State oard of Education epartment of Public Instruction ivision of ccountability Services/North

More information

Midterm Prep. 1. Which combination correctly pairs a vector quantity with its corresponding unit?

Midterm Prep. 1. Which combination correctly pairs a vector quantity with its corresponding unit? Name: ate: 1. Which combination correctly pairs a vector quantity with its corresponding unit?. weight and kg. velocity and m/s. speed and m/s. acceleration and m 2 /s 2. 12.0-kilogram cart is moving at

More information

Physics 111. Lecture 15 (Walker: 7.1-2) Work & Energy March 2, Wednesday - Midterm 1

Physics 111. Lecture 15 (Walker: 7.1-2) Work & Energy March 2, Wednesday - Midterm 1 Physics 111 Lecture 15 (Walker: 7.1-2) Work & Energy March 2, 2009 Wednesday - Midterm 1 Lecture 15 1/25 Work Done by a Constant Force The definition of work, when the force is parallel to the displacement:

More information

Momentum, Work and Energy Review

Momentum, Work and Energy Review Momentum, Work and Energy Review 1.5 Momentum Be able to: o solve simple momentum and impulse problems o determine impulse from the area under a force-time graph o solve problems involving the impulse-momentum

More information

UNIVERSITY OF MANITOBA

UNIVERSITY OF MANITOBA PAGE NO.: 1 of 6 + Formula Sheet Equal marks for all questions. No marks are subtracted for wrong answers. Record all answers on the computer score sheet provided. USE PENCIL ONLY! Black pen will look

More information

Unit 4 Work, Power & Conservation of Energy Workbook

Unit 4 Work, Power & Conservation of Energy Workbook Name: Per: AP Physics C Semester 1 - Mechanics Unit 4 Work, Power & Conservation of Energy Workbook Unit 4 - Work, Power, & Conservation of Energy Supplements to Text Readings from Fundamentals of Physics

More information

AP* Circular & Gravitation Free Response Questions

AP* Circular & Gravitation Free Response Questions 1992 Q1 AP* Circular & Gravitation Free Response Questions A 0.10-kilogram solid rubber ball is attached to the end of a 0.80-meter length of light thread. The ball is swung in a vertical circle, as shown

More information

AP1 WEP. Answer: E. The final velocities of the balls are given by v = 2gh.

AP1 WEP. Answer: E. The final velocities of the balls are given by v = 2gh. 1. Bowling Ball A is dropped from a point halfway up a cliff. A second identical bowling ball, B, is dropped simultaneously from the top of the cliff. Comparing the bowling balls at the instant they reach

More information