Questions and Problems


 Angelica Bethanie Sims
 4 years ago
 Views:
Transcription
1 Questions and Problems 189 Questions and Problems In a few problems, you are given more data than you actually need; in a few other problems, you are required to supply data from your general knowledge, outside sources, or informed estimate. Interpret as significant all digits in numerical values that have trailing zeros and no decimal points. or all problems, use g = 9.80 m>s 2 for the freefall acceleration due to gravity. Basic, singleconcept problem Intermediatelevel problem, may require synthesis of concepts and multiple steps Challenging problem SS Solution is in Student Solutions anual Conceptual Questions 1. Complete the sentence: The static frictional force between two surfaces is (never/sometimes/always) less than the normal force. Explain your answer. 2. You want to push a heavy box of books across a rough floor. You know that the maximum value of the coefficient of static friction (m s ) is larger than the maximum value of the coefficient of kinetic friction (m k ). Should you push the box for a short distance, rest, push the box another short distance, and then repeat the process until the box is where you want it, or will it be easier to keep pushing the box across the floor once you get it moving? 3. If the force of friction always opposes the sliding of an object, how then can a frictional force cause an object to increase in speed? SS 4. A solid rectangular block has sides of three different areas. You can choose to rest any of the sides on the floor as you apply a horizontal force to the block. Does the choice of side on the floor affect how hard it is to push the block? Explain your answer. 5. You re trying to press a book against a spot on the wall with your hand. As you get tired, you exert less force, but the book remains in the same spot on the wall. Do each of the following forces increase, decrease, or not change in magnitude when you reduce the force you are applying to the book: (a) weight, (b) normal force, (c) frictional force, and (d) maximum static frictional force? 6. or an object moving in a circle, which of the following quantities are zero over one revolution: (a) displacement, (b) average velocity, (c) average acceleration, (d) instantaneous velocity, and (e) instantaneous centripetal acceleration? 7. Why does water stay in a bucket that is whirled around in a vertical circle? Contrast the forces acting on the water when the bucket is at the lowest point on the circle to when the bucket is at the highest point on the circle. SS 8. An antilock braking system (ABS) prevents wheels from skidding while drivers stomp on the brakes in emergencies. How far will a car with an ABS move before finally stopping, as compared to a car without an ABS? 9. Give two examples of two situations in which the normal force acting on an object is not equal to the object s weight. 10. edical A fluidlike substance called synovial fluid lubricates the surfaces where bones meet in joints, making the coefficient of friction between bones very small. Why is the minimum force required for moving bones in a typical knee joint different for different people, in spite of the fact that their joints have the same coefficient of friction? or simplicity, assume the surfaces in the knee are flat and horizontal. 11. As a skydiver falls faster and faster through the air, does his acceleration increase, decrease, or remain the same? Explain your answer. SS 12. Why do raindrops fall from the sky at different speeds? Explain your answer. 13. Why might your car start to skid if you drive too fast around a curve? 14. What distinguishes the forces that act on a car driving over the top of a hill from those acting on a car driving through a dip in the road? Explain how the forces relate to the sensations passengers in the car experience during each situation. 15. Explain how you might measure the centripetal acceleration of a car rounding a curve. SS 16. An object of mass 1 rests on a horizontal table; friction exists between the object and the table (igure 521). A ring of mass R is tied by massless strings both to the wall and to the object as shown. A second object of mass 2 hangs from the ring. Draw freebody diagrams for the situation. riction 1 R 2 igure 521 Problem Explain why curves in roads and cycling velodromes are banked. SS 18. At low speeds, the drag force on an object moving through a fluid is proportional to its velocity. According to Newton s second law, force is proportional to acceleration. As acceleration and velocity aren t the same quantity, is there a contradiction here? 19. James Bond leaps without a parachute from a burning airplane flying at 15,000 ft. Ten seconds later his assistant, who was following behind in another plane dives after him, wearing her parachute and clinging to one for her hero. Is it possible for her to catch up with Bond and save him? ultiplechoice Questions 20. If a sport utility vehicle (SUV) drives up a slope of 45, what must be the minimum coefficient of static friction between the SUV s tires and the road? A. 1.0 B. 0.5 C. 0.7 D. 0.9 E reed_c05_ hr1.indd 189 8/28/12 6:24 P
2 190 Chapter 5 orces and otion II: Applications 21. A block of mass m slides down a rough incline with constant speed. If a similar block that has a mass of 4m were placed on the same incline, it would A. slide down at constant speed. B. accelerate down the incline. C. slowly slide down the incline and then stop. D. accelerate down the incline with an acceleration four times greater than that of the smaller block. E. not move. SS 22. A 10kg crate is placed on a horizontal conveyor belt moving with a constant speed. The crate does not slip. If the coefficients of friction between the crate and the belt are m s equal to 0.50 and m k equal to 0.30, what is the frictional force exerted on the crate? A. 98 N B. 49 N C. 29 N D. 9.8 N E Biology The Escherichia coli (E. coli) bacterium propels itself through water by means of long, thin structures called flagella. If the force exerted by the flagella doubles, the velocity of the bacterium A. doubles. B. decreases by half. C. does not change. D. increases by a factor of four. E. cannot be determined without more information. 24. A 1kg wood ball and a 5kg lead ball have identical sizes, shapes, and surface characteristics. They are dropped simultaneously from a tall tower. Air resistance is present. How do their accelerations compare? A. The 1kg wood ball has the larger acceleration. B. The 5kg lead ball has the larger acceleration. C. The accelerations are the same. D. The 5kg ball accelerates at five times the acceleration of the 1kg ball. E. The 1kg ball accelerates at five times the acceleration of the 5kg ball. 25. A skydiver is falling at his terminal speed. Immediately after he opens his parachute A. his speed will be larger than his terminal speed. B. the drag force on the skydiver will decrease. C. the net force on the skydiver is in the downward direction. D. the drag force is larger than the skydiver s weight. E. the net force on the skydiver is zero. SS 26. Two rocks that are of equal mass are tied to massless strings and whirled in nearly horizontal circles at the same speed. One string is twice as long as the other. What is the tension T 1 in the shorter string compared to the tension T 2 in the longer one? A. T 1 = 14T 2 B. T 1 = 12T 2 C. T 1 = T 2 D. T 1 = 2T 2 E. T 1 = 4T You are on a erris wheel moving in a vertical circle. When you are at the bottom of the circle, how does the magnitude of the normal force N exerted by your seat compare to your weight mg? A. N = mg B. N 7 mg C. N 6 mg D. N = 12mg E. N = 2mg SS 28. Two rocks are tied to massless strings and whirled in nearly horizontal circles so that the period of motion is the same for both. One string is twice as long as the other. The tension in the longer string is twice the tension in the shorter one. What is the mass m 1 of the rock at the end of the shorter string compared to the mass m 2 of the rock at the end of the longer one? A. m 1 = 14m 2 B. m 1 = 12m 2 C. m 1 = m 2 D. m 1 = 2m 2 E. m 1 = 4m 2 Estimation/Numerical Analysis 29. Estimate the numerical value of the coefficient of static friction between a car s tires and dry pavement. 30. Estimate the value of the coefficient of kinetic friction for a box of books on a carpeted floor. 31. Sports ake a rough estimate of the value of the coefficient of kinetic friction between a baseball player s uniform and the infield surface as he slides into second base. SS 32. Give a numerical estimate of the minimum radius of curvature of an unbanked onramp for a typical freeway. 33. Sports Estimate the size of the coefficient of kinetic friction between a hockey puck and the ice of a rink. 34. (a) Estimate the magnitude of the coefficient of kinetic friction of a book as it slides across a tabletop. (b) Estimate the magnitude of the coefficient of static friction for the same book on the same tabletop. 35. Estimate the magnitude of the coefficient of kinetic friction between you and the surface of a waterslide. SS 36. Estimate the magnitude of the coefficient of kinetic friction for a mug of root beer as it slides across a wooden bar. 37. The following table lists the forces applied to a 1.00kg t (s) (N) t (s) (N) crate at particular times. The crate begins at rest on a rough, horizontal surface but is then pushed with a constant force in the horizontal direction. Using the data, estimate the coefficient of static friction and the coefficient of kinetic friction between the crate and the surface. Problems 52 The static friction force changes magnitude to offset other applied forces 38. What is the minimum horizontal force that will cause a 5.00kg box to begin to slide on a horizontal surface when the coefficient of static friction is 0.670? reed_c05_ hr1.indd 190 8/28/12 6:24 P
3 Questions and Problems A 7.60kg object rests on a level floor with a coefficient of static friction of What minimum horizontal force will cause the object to start sliding? SS 40. Draw a freebody diagram for the situation shown in igure An object of mass rests on a ramp; there is friction between the object and the ramp. The system is in equilibrium. cause the object to accelerate at 2.50 m>s 2? The force is applied at an angle of u = 30.0 (igure 525). riction µ k θ =? igure 525 Problem 46 igure 522 Problem The kinetic friction force on a sliding object has a constant magnitude 41. A book is pushed across a horizontal table at a constant speed. If the horizontal force applied to the book is equal to onehalf of the book s weight, calculate the coefficient of kinetic friction between the book and the tabletop. SS 42. An object on a level surface experiences a horizontal force of 12.7 N due to kinetic friction. If the coefficient of kinetic friction is 0.37, what is the mass of the object? 43. A 25.0kg crate rests on a level floor. A horizontal force of 50.0 N accelerates the crate at 1.00 m>s 2. Calculate (a) the normal force on the crate, (b) the frictional force on the crate, and (c) the coefficient of kinetic friction between the crate and the floor. 44. A block of mass rests on a block of mass 1 = 5.00 kg which is on a tabletop (igure 523). A light string passes over a frictionless peg and connects the blocks. The coefficient of kinetic friction m k at both surfaces equals A force of 60.0 N pulls the upper block to the left and the lower block to the right. The blocks are moving at a constant speed. Determine the mass of the upper block. 54 Problems involving static and kinetic friction are like any other problem with forces 47. A taut string connects a crate with mass 1 = 5.00 kg to a crate with mass 2 = 12.0 kg (igure 526). The coefficient of static friction between the smaller crate and the floor is 0.573; the coefficient of static friction between the larger crate and the floor is What is the minimum horizontal force required to start the crates in motion? SS 2 1 igure 526 Problem A box of mass box = 2.00 kg rests on top of a crate with mass crate = 5.00 kg (igure 527). The coefficient of static friction between the box and the crate is The coefficient of static friction between the crate and the floor is Calculate the minimum force that is required to move the crate to the right and the corresponding tension T in the rope that connects the box to the wall when the crate is moved. T Box 1 igure 523 Problem A mop is pushed across the floor with a force of 50.0 N at an angle of u = 50.0 (igure 524). The mass of the mop head is 3.75 kg. Calculate the acceleration of the mop head if the coefficient of kinetic friction between the head and the floor is igure 527 Problem 48 Crate 49. Two blocks are connected over a massless, frictionless pulley (igure 528). The mass of block 2 is 8.00 kg, and the coefficient of kinetic friction between block 2 and the incline is The angle u of the incline is Block 2 slides down the incline at constant speed. What is the mass of block 1? SS u µ k igure 524 Problem If the coefficient of kinetic friction between an object with mass = 3.00 kg and a flat surface is 0.400, what force will 1 2 riction q igure 528 Problems 49 and Two blocks are connected over a massless, frictionless pulley (igure 528). The mass of block 2 is 10.0 kg, and the reed_c05_ _st_hr2.indd 191 4/2/13 3:08 P
4 192 Chapter 5 orces and otion II: Applications coefficient of kinetic friction between block 2 and the incline is The angle u of the incline is If block 2 moves up the incline at constant speed, what is the mass of block 1? 51. An object with mass 1 of 2.85 kg is held in place on an inclined plane that makes an angle u of 40.0 with the horizontal (igure 529). The coefficient of static friction between the plane and the object is A second object that has a mass 2 of 4.75 kg is connected to the first object with a massless string over a massless, frictionless pulley. Calculate the initial acceleration of the system and the tension in the string once the objects are released. 2 1 Static friction u igure 529 Problem Draw freebody diagrams for the situation 1 shown in igure An 2 riction object of mass 2 rests on a frictionless table, and an object of mass 1 sits on it; there is friction between the objects. A horizontal force s is applied to the lower object as shown. igure 530 Problem 52 rictionless 53. A horizontal force of 10.0 N is applied to a stationary block with a mass of 2.00 kg as shown in igure The coefficient of static friction between the block and the floor is 0.750; the coefficient of kinetic friction is ind the acceleration of the box. SS riction igure 531 Problem An object moving through air or water experiences a drag force 54. Biology A singlecelled animal called a paramecium propels itself quite rapidly through water by using its hairlike cilia. A certain paramecium experiences a drag force of magnitude drag = cv 2 in water, where the drag coefficient c is approximately What propulsion force does this paramecium generate when moving at a constant (terminal) speed v of * 10 3 m>s? 55. Biology The bacterium Escherichia coli propels itself with long, thin structures called flagella. When its flagella exert a force of 1.50 * N, the bacterium swims through water at a speed of 20.0 mm>s. ind the speed of the bacterium in water when the force exerted by its flagella is 3.00 * N. 56. We model the drag force of the atmosphere as proportional to the square of the speed of a falling object, drag = cv 2, where the value of c for a 70.0kg person with a parachute is 18.0 kg>m. (a) What is the person s terminal velocity? (b) Without a parachute, the same person s terminal velocity would be about 50.0 m>s. What would be the value of the proportionality constant c in that case? 57. A girl rides her scooter on a hill that is inclined at 10 with the horizontal. The combined mass of the girl and scooter is 50.0 kg. On the way down, she coasts at a constant speed of 12.0 m>s, while experiencing a drag force that is proportional to the square of her velocity. What force, parallel to the surface of the hill, is required to increase her speed to 20.0 m>s? Neglect any other resistive forces. 56 In uniform circular motion, the net force points toward the center of the circle 58. A hockey puck that has a mass of 170 g is tied to a light string and spun in a circle of radius 1.25 m (on frictionless ice). If the string breaks under a tension that exceeds 5.00 N, what is the maximum speed of the puck without breaking the string? 59. A 1500kg truck rounds an unbanked curve on the highway at a speed of 20.0 m>s. If the maximum frictional force between the surface of the road and all four of the tires is 8000 N, calculate the minimum radius of curvature for the curve to prevent the truck from skidding off the road. SS 60. A 25.0g metal washer is tied to a 60.0cmlong string and whirled around in a vertical circle at a constant speed of 6.00 m>s. Calculate the tension in the string (a) when the washer is at the bottom of the circular path and (b) when it is at the top of the path. 61. A centrifuge spins small tubes in a circle of radius 10.0 cm at a rate of 1200 rev>min. What is the centripetal force on a sample that has a mass of 1.00 g? SS 62. Astro What centripetal force is exerted on the oon as it orbits about Earth at a centertocenter distance of 3.84 * 10 8 m with a period of 27.4 days? What is the source of the force? The mass of the oon is equal to 7.35 * kg. 63. Biology Very highspeed ultracentrifuges are useful devices to sediment materials quickly or to separate materials. An ultracentrifuge spins a small tube in a circle of radius 10.0 cm at 60,000 rev>min. What is the centripetal force experienced by a sample that has a mass of kg? 64. At the ermi National Accelerator Laboratory (ermilab), a large particle accelerator, protons are made to travel in a circular orbit 6.3 km in circumference at a speed of nearly 3.0 * 10 8 m>s. What is the centripetal acceleration of one of the protons? 65. In the game of tetherball, a 1.25m rope connects a kg ball to the top of a 1.25 m u vertical pole so that the ball can spin around the pole as 0.75 kg shown in igure What is the speed of the ball as it rotates around the pole when the angle u of the rope is 35.0 with the vertical? SS igure 532 Problem 65 reed_c05_ hr3.indd 192 9/17/12 4:06 P
5 Questions and Problems What is the force that a jet pilot feels against his seat as he completes a vertical loop that is 500 m in radius at a speed of 200 m>s? Assume his mass is 70.0 kg and that he is located at the bottom of the loop. 67. The radius of Earth is 6.38 * 10 6 m, and it completes one revolution in 1 day. (a) What is the centripetal acceleration of an object located on the equator? (b) What is the centripetal acceleration of an object located at latitude 40.0 north? 68. A coin that has a mass of 25.0 g rests on a phonograph turntable that rotates at 78.0 rev>min. The center of the coin is 13.0 cm from the turntable axis. If the coin does not slip, what is the minimum value of the coefficient of static friction between the coin and the turntable surface? 69. Sports In executing a windmill pitch, a fastpitch softball player moves her hand through a circular arc of radius m. The kg ball leaves her hand at 24.0 m>s. What is the magnitude of the force exerted on the ball by her hand immediately before she releases it? General Problems 70. A 150kg crate rests in the bed of a truck that slows from 50.0 km>h to a stop in 12.0 s. The coefficient of static friction between the crate and the truck bed is (a) Will the crate slide during the braking period? Explain your answer. (b) What is the minimum stopping time for the truck in order to prevent the crate from sliding? 71. The coefficient of static friction between a rubber tire and dry pavement is about Assume that a car s engine only turns the two rear wheels and that the weight of the car is uniformly distributed over all four wheels. (a) What limit does the coefficient of static friction place on the time required for a car to accelerate from rest to 60 mph (26.8 m>s)? (b) How can friction accelerate a car forward when friction opposes motion? SS 72. Two blocks are connected over a massless, frictionless pulley (igure 533). Block m 1 has a mass of 1.00 kg and block m 2 has a mass of kg. The angle u of the incline is The coefficients of static friction and kinetic friction between block m 1 and the incline are m s equal to and m k equal to 0.400, respectively. What is the value of the tension in the string? m 2 m 1 riction θ igure 533 Problems 72 and Two blocks are connected over a massless, frictionless pulley (igure 533). Block m 1 has a mass of 1.00 kg and block m 2 has a mass of 2.00 kg. The angle u of the incline is The coefficients of static friction and kinetic friction between block m 1 and the incline are m s equal to and m k equal to What is the acceleration of block m 1? 74. A runaway ski slides down a 250mlong slope inclined at 37.0 with the horizontal. If the initial speed is 10.0 m>s, how long does it take the ski to reach the bottom of the incline if the coefficient of kinetic friction between the ski and snow is (a) and (b) 0.150? 75. In a mailsorting facility, a 2.50kg package slides down an inclined plane that makes an angle of 20.0 with the horizontal. The package has an initial speed of 2.00 m>s at the top of the incline, and it slides a distance of 12.0 m. What must the coefficient of kinetic friction between the package and the inclined plane be so that the package reaches the bottom with no speed? SS 76. In igure 534, two blocks are connected to each other by a massless string over a massless and frictionless pulley. The mass m 1 is 6.00 kg. Assuming the coefficient of static friction m s equals for all surfaces, find the range of values of the mass m 2 of the second block so that the system is in equilibrium. Static friction m igure 534 Problem 76 m 2 Static friction 77. The terminal velocity of a raindrop that is 4.00 mm in diameter is approximately 8.50 m>s under controlled, windless conditions. The density of water is 1000 kg>m 3. Recall that the density of an object is its mass divided by its volume. (a) If we model the air drag as being proportional to the square of the speed, drag = cv 2, what is the value of c? (b) Under the same conditions as above, what would be the terminal velocity of a raindrop that is 8.0 mm in diameter? Try to use your answer from part (a) to solve the problem by proportional reasoning instead of just doing the same calculation over again. 78. Biomedical laboratories routinely use ultracentrifuges, some of which are able to spin at 100,000 rev>min about the central axis. The turning rotor in certain models is about 20.0 cm in diameter. At its top spin speed, what force does the bottom of the rotor exert on a 2.00g sample that is in the rotor at the greatest distance from the axis of spin? Would the force be appreciably different if the sample were spun in a vertical or a horizontal circle? Why or why not? 79. An amusement park ride called the Rotor debuted in 1955 in Germany. Passengers stand in the cylindrical drum of the Rotor as it rotates around its axis. Once the Rotor reaches its operating speed, the floor drops but the riders remain pinned against the wall of the cylinder. Suppose the cylinder makes 25.0 rev>min and has a radius of 3.50 m. What is the coefficient of static friction between the wall of the cylinder and the backs of the riders? 80. An object of mass m 1 undergoes constant circular motion and is connected by a massless string through a hole in a frictionless table to a larger object of mass m 2 (igure 535). If the larger object is stationary, calculate the tension in the string and the speed of the circular motion of the smaller object. Assume that the objects have masses of and kg and the reed_c05_ hr1.indd 193 8/28/12 6:24 P
6 194 Chapter 5 orces and otion II: Applications radius R of the circular path of the smaller object is equal to 1.00 m. m 2 R m 1 to two significant figures. (a) What is the acceleration of the head during the collision? (b) What force (in newtons and in pounds) does the neck exert on the head of a 75kg person in the collision? (As a first approximation, neglect the force of gravity on the head.) (c) Would headrests mounted to the backs of the car seats help protect against whiplash? Why or why not? 83. The wings of an airplane flying in a horizontal circle at a speed of 680 km>h are tilted 60.0 to the horizontal (igure 537). What is the radius of the circle? Assume that the required force is provided entirely by the wings lift, a force perpendicular to the surface of the wings. igure 535 Problem An object that has a mass hangs from a support by a massless string of length L (igure 536). The support is rotated so that the object follows a circular path at an angle u from the vertical as shown. The object makes N revolutions per second. Derive an expression for the angle u in terms of, L, N, and any necessary physical constants. SS L θ 60 igure 537 Problem A curve that has a radius of 100 m is banked at an angle of 10.0 (igure 538). If a 1000kg car navigates the curve at 65 km>h without skidding, what is the minimum coefficient of static friction between the pavement and the tires? igure 536 Problem edical Occupants of cars hit from behind, even at low speed, often suffer serious neck injury from whiplash. During a lowspeed rearend collision, a person s head suddenly pivots about the base of the neck through a 60 angle, a motion that lasts 250 ms. The distance from the base of the neck to the center of the head is typically about 20 cm, and the head normally comprises about 6.0% of body weight. We can model the motion of the head as having uniform speed over the course of its pivot. Compute your answers to the following questions 10 igure 538 Problem 84 reed_c05_ hr1.indd 194 8/28/12 6:25 P
66 Chapter 6: FORCE AND MOTION II
Chapter 6: FORCE AND MOTION II 1 A brick slides on a horizontal surface Which of the following will increase the magnitude of the frictional force on it? A Putting a second brick on top B Decreasing the
More informationAssignment 4.2 Frictional Forces CONCEPTUAL QUESTIONS: 1. What is the SI unit of the coefficient of friction (μ s or μ k )?
CONCEPTUAL QUESTIONS: 1. What is the SI unit of the coefficient of friction (μ s or μ k )? 2. Tennis is played on clay, grass, and hard surfaces. Please explain why you think tennis players have or don
More informationLecture PowerPoints. Chapter 5 Physics for Scientists & Engineers, with Modern Physics, 4 th edition. Giancoli
Lecture PowerPoints Chapter 5 Physics for Scientists & Engineers, with Modern Physics, 4 th edition 2009 Pearson Education, Inc. This work is protected by United States copyright laws and is provided solely
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) You are standing in a moving bus, facing forward, and you suddenly fall forward as the
More informationWSCH4 Motion and Force Show all your work and equations used. Isaac Newton ( )
AP PHYSICS 1 WSCH4 Motion and Force Show all your work and equations used. Isaac Newton (16431727) Isaac Newton was the greatest English mathematician of his generation. He laid the foundation for differential
More informationReview PHYS114 Chapters 47
Review PHYS114 Chapters 47 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A 27 kg object is accelerated at a rate of 1.7 m/s 2. What force does
More informationCircular Velocity and Centripetal Acceleration
1. An object is spun around in circular motion such that it completes 100 cycles in 25 s. a. What is the period of its rotation? [0.25 s] b. If the radius is 0.3 m what is the velocity? [7.54 m/s] c. Draw
More informationMULTIPLE 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 informationHATZIC SECONDARY SCHOOL
HATZIC SECONDARY SCHOOL PROVINCIAL EXAMINATION ASSIGNMENT CIRCULAR MOTION MULTIPLE CHOICE / 30 OPEN ENDED / 65 TOTAL / 95 NAME: 1. An object travels along a path at constant speed. There is a constant
More informationReading Quiz. Chapter 5. Physics 111, Concordia College
Reading Quiz Chapter 5 1. The coefficient of static friction is A. smaller than the coefficient of kinetic friction. B. equal to the coefficient of kinetic friction. C. larger than the coefficient of kinetic
More informationEndofChapter Exercises
EndofChapter Exercises For all these exercises, assume that all strings are massless and all pulleys are both massless and frictionless. We will improve our model and learn how to account for the mass
More informationStudy Questions/Problems Week 4
Study Questions/Problems Week 4 Chapter 6 treats many topics. I have selected on average less than three problems from each topic. I suggest you do them all. Likewise for the Conceptual Questions and exercises,
More information4) Vector = and vector = What is vector = +? A) B) C) D) E)
1) Suppose that an object is moving with constant nonzero acceleration. Which of the following is an accurate statement concerning its motion? A) In equal times its speed changes by equal amounts. B) In
More informationAP Physics C: Mechanics Practice (Newton s Laws including friction, resistive forces, and centripetal force).
AP Physics C: Mechanics Practice (Newton s Laws including friction, resistive forces, and centripetal force). 1981M1. A block of mass m, acted on by a force of magnitude F directed horizontally to the
More informationC) D) 2. The diagram below shows a worker using a rope to pull a cart.
1. Which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls? 2. The diagram below shows a worker using a rope
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Common Quiz Mistakes / Practice for Final Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A ball is thrown directly upward and experiences
More informationName St. Mary's HS AP Physics Circular Motion HW
Name St. Mary's HS AP Physics Circular Motion HW Base your answers to questions 1 and 2 on the following situation. An object weighing 10 N swings at the end of a rope that is 0.72 m long as a simple pendulum.
More informationFRICTIONAL FORCES. Direction of frictional forces... (not always obvious)... CHAPTER 5 APPLICATIONS OF NEWTON S LAWS
RICTIONAL ORCES CHAPTER 5 APPLICATIONS O NEWTON S LAWS rictional forces Static friction Kinetic friction Centripetal force Centripetal acceleration Looptheloop Drag force Terminal velocity Direction
More informationPhysics 12. Unit 5 Circular Motion and Gravitation Part 1
Physics 12 Unit 5 Circular Motion and Gravitation Part 1 1. Nonlinear motions According to the Newton s first law, an object remains its tendency of motion as long as there is no external force acting
More informationCircular Motion.
1 Circular Motion www.njctl.org 2 Topics of Uniform Circular Motion (UCM) Kinematics of UCM Click on the topic to go to that section Period, Frequency, and Rotational Velocity Dynamics of UCM Vertical
More informationHint 1. The direction of acceleration can be determined from Newton's second law
Chapter 5 [ Edit ] Overview Summary View Diagnostics View Print View with Answers Chapter 5 Due: 11:59pm on Sunday, October 2, 2016 To understand how points are awarded, read the Grading Policy for this
More informationF 2 = 26 N.What third force will cause the object to be in equilibrium (acceleration equals zero)?
FLEX Physical Science AP Physics C Mechanics  Midterm 1) If you set the cruise control of your car to a certain speed and take a turn, the speed of the car will remain the same. Is the car accelerating?
More informationNewton s Laws.
Newton s Laws http://mathsforeurope.digibel.be/images Forces and Equilibrium If the net force on a body is zero, it is in equilibrium. dynamic equilibrium: moving relative to us static equilibrium: appears
More informationKinematics. 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 informationB) v `2. C) `2v. D) 2v. E) 4v. A) 2p 25. B) p C) 2p. D) 4p. E) 4p 2 25
1. 3. A ball attached to a string is whirled around a horizontal circle of radius r with a tangential velocity v. If the radius is changed to 2r and the magnitude of the centripetal force is doubled the
More information2. Kinetic friction  The force that acts against an object s motion.  Occurs once static friction has been overcome and object is moving
Section 2.14: Friction Friction is needed to move. Without friction, a car would sit in one spot spinning its tires, and a person would not be able to step forward. However, the motion of an object along
More informationThere are two main types of friction:
Section 4.15: Friction Friction is needed to move. Without friction, a car would sit in one spot spinning its tires, and a person would not be able to step forward. However, the motion of an object along
More informationCircular Motion. 2 types of Acceleration. Centripetal Force and Acceleration. In a circle. Constant Velocity vs. Constant Speed.
Circular Motion What does it mean to accelerate Centripetal Force and Acceleration Constant Velocity vs. Constant Speed. 2 types of Acceleration In a circle Direction of acceleration / velocity top view
More informationAnnouncements 24 Sep 2013
Announcements 24 Sep 2013 1. If you have questions on exam 1 2. Newton s 2 nd Law Problems: F m a. Inclined planes b. Pulleys c. Ropes d. Friction e. Etc Remember N2 is a blueprint for obtaining a useful
More informationUnit 5 Circular Motion and Gravitation
Unit 5 Circular Motion and Gravitation In the game of tetherball, the struck ball whirls around a pole. In what direction does the net force on the ball point? 1) Tetherball 1) toward the top of the pole
More information1. 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 25N crate slides down a frictionless incline that is 25 above the horizontal.
More informationChapter 6. Force and Motion II
Chapter 6 Force and Motion II 6 Force and Motion II 2 Announcement: Sample Answer Key 3 4 62 Friction Force Question: If the friction were absent, what would happen? Answer: You could not stop without
More informationREVIEW SET 2 MIDTERM 2
Physics 2010 Fall 2012 Orest Symko REVIEW SET 2 MIDTERM 2 1. In a popular amusement park ride, a rotating cylinder of radius 15.0 m rotates with an angular speed of 8.0 rad/s. The floor of then drops away
More informationCutnell/Johnson Physics
Cutnell/Johnson Physics Classroom Response System Questions Chapter 5 Dynamics of Uniform Circular Motion Interactive Lecture Questions 5.1.1. An airplane flying at 115 m/s due east makes a gradual turn
More informationAlgebra Based Physics Uniform Circular Motion
1 Algebra Based Physics Uniform Circular Motion 2016 07 20 www.njctl.org 2 Uniform Circular Motion (UCM) Click on the topic to go to that section Period, Frequency and Rotational Velocity Kinematics of
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
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 informationExam. Name. 1) For general projectile motion with no air resistance, the horizontal component of a projectile's velocity A) B) C) D)
Exam Name 1) For general projectile motion with no air resistance, the horizontal component of a projectile's velocity 2) An athlete participates in an interplanetary discus throw competition during an
More informationDynamicsFriction. 1. Which vector diagram best represents a cart slowing down as it travels to the right on a horizontal surface?
1. Which vector diagram best represents a cart slowing down as it travels to the right on a horizontal surface? Base your answers to questions 2 and 3 on the information A student and the waxed skis she
More informationa reference frame that accelerates in a straight line a reference frame that moves along a circular path Straight Line Accelerated Motion
1.12.1 Introduction Go back to lesson 9 and provide bullet #3 In today s lesson we will consider two examples of noninertial reference frames: a reference frame that accelerates in a straight line a reference
More informationFriction is always opposite to the direction of motion.
6. Forces and MotionII 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 informationPRACTICE 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 informationy(t) = y 0 t! 1 2 gt 2. With y(t final ) = 0, we can solve this for v 0 : v 0 A ĵ. With A! ĵ =!2 and A! = (2) 2 + (!
1. The angle between the vector! A = 3î! 2 ĵ! 5 ˆk and the positive y axis, in degrees, is closest to: A) 19 B) 71 C) 90 D) 109 E) 161 The dot product between the vector! A = 3î! 2 ĵ! 5 ˆk and the unit
More informationDynamics Test K/U 28 T/I 16 C 26 A 30
Name: Dynamics Test K/U 28 T/I 16 C 26 A 30 A. True/False Indicate whether the sentence or statement is true or false. 1. The normal force that acts on an object is always equal in magnitude and opposite
More informationName Period Date A) B) C) D)
Example Problems 9.2 E1. A car rounds a curve of constant radius at a constant speed. Which diagram best represents the directions of both the car s velocity and acceleration? Explain: A) B) C) D) E2.
More information1. In which situation is an object undergoing centripetal acceleration? (C) a car accelerating on a drag strip (D) a hockey puck gliding on ice
Physics 3204 Assignment 2.1 UCM DUE: Thursday Nov 24, 2017 Name: Part A. Multiple Choice: Select the best possible answer. Place the answer on the answer sheet. 1. In which situation is an object undergoing
More informationQ2. A book whose mass is 2 kg rests on a table. Find the magnitude of the force exerted by the table on the book.
AP Physics 1 Dynamics Practice Problems FACT: Inertia is the tendency of an object to resist a change in state of motion. A change in state of motion means a change in an object s velocity, therefore
More informationChapter 6. Force and MotionII (Friction, Drag, Circular Motion)
Chapter 6 Force and MotionII (Friction, Drag, Circular Motion) 6.2 Frictional Force: Motion of a crate with applied forces There is no attempt at sliding. Thus, no friction and no motion. NO FRICTION
More informationΣF=ma SECOND LAW. Make a freebody diagram for EVERY problem!
PHYSICS HOMEWORK #31 SECOND LAW ΣF=ma NEWTON S LAWS Newton s Second Law of Motion The acceleration of an object is directly proportional to the force applied, inversely proportional to the mass of the
More informationHSC PHYSICS ONLINE B F BA. repulsion between two negatively charged objects. attraction between a negative charge and a positive charge
HSC PHYSICS ONLINE DYNAMICS TYPES O ORCES Electrostatic force (force mediated by a field  long range: action at a distance) the attractive or repulsion between two stationary charged objects. AB A B BA
More informationName: Date: Period: AP Physics C Work HO11
Name: Date: Period: AP Physics C Work HO11 1.) Rat pushes a 25.0 kg crate a distance of 6.0 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction
More informationThe 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 information3 Using Newton s Laws
3 Using Newton s Laws What You ll Learn how Newton's first law explains what happens in a car crash how Newton's second law explains the effects of air resistance 4(A), 4(C), 4(D), 4(E) Before You Read
More informationCHAPTER 4 TEST REVIEW  Answer Key
AP PHYSICS Name: Period: Date: DEVIL PHYSICS BADDEST CLASS ON CAMPUS 50 Multiple Choice 45 Single Response 5 MultiResponse Free Response 3 Short Free Response 2 Long Free Response AP EXAM CHAPTER TEST
More informationShow all workings for questions that involve multiple choice.
Assignment 2 Unit 2 Newton s Laws (Outcomes 3255, 3258) Name: Multiple Choice: Show all workings for questions that involve multiple choice. 1 Which choice represents a NONINERTIAL frame of reference?
More informationPage 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! 71641  Page 1 1) A car travels at constant speed around a section of horizontal, circular track. On the diagram provided
More informationFORCE AND MOTION. Conceptual Questions F G as seen in the figure. n, and a kinetic frictional force due to the rough table surface f k
FORCE AND MOTION 5 Conceptual Questions 5.1. Two forces are present, tension T in the cable and gravitational force 5.. F G as seen in the figure. Four forces act on the block: the push of the spring F
More informationREVIEW SET 2 MIDTERM 2
Physics 2010 Fall 2009 Sid Rudolph REVIEW SET 2 MIDTERM 2 1. In a popular amusement park ride, a rotating cylinder of radius 15.0 m rotates with an angular speed of 8.0 rad/s. The floor of then drops away
More informationCircular motion minutes. 62 marks. theonlinephysicstutor.com. facebook.com/theonlinephysicstutor Page 1 of 22. Name: Class: Date: Time: Marks:
Circular motion 2 Name: Class: Date: Time: 67 minutes Marks: 62 marks Comments: Page 1 of 22 1 A lead ball of mass 0.25 kg is swung round on the end of a string so that the ball moves in a horizontal circle
More informationReview 3: Forces. 1. Which graph best represents the motion of an object in equilibrium? A) B) C) D)
1. Which graph best represents the motion of an object in equilibrium? A) B) C) D) 2. A rock is thrown straight up into the air. At the highest point of the rock's path, the magnitude of the net force
More informationPractice Honors Physics Test: Newtons Laws
Name: Class: Date: Practice Honors Physics Test: Newtons Laws Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Acceleration is defined as the CHANGE in
More informationQuest Chapter 09. Eliminate the obviously wrong answers. Consider what is changing: speed, velocity, some part of velocity? Choose carefully.
1 A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Which statement is true? 1. The dragster rounded the curve at a changing speed of 100 km/h. 2.
More informationCircular Motion.  The velocity is tangent to the path and perpendicular to the radius of the circle
Circular Motion Level : Physics Teacher : Kim 1. Uniform Circular Motion  According to Newton s 1 st law, an object in motion will move in a straight line at a constant speed unless an unbalance force
More informationForces and Newton s Laws
chapter 3 Forces and Newton s Laws section 3 Using Newton s Laws Before You Read Imagine riding on a sled, or in a wagon, or perhaps a school bus that stops quickly or suddenly. What happens to your body
More information2) A car accelerates from 5.0 m/s to 21 m/s at a rate of 3.0 m/s 2. How far does it travel while accelerating? A) 207 m B) 117 m C) 41 m D) 69 m
Name VECTORS 1) An airplane undergoes the following displacements: First, it flies 59 km in a direction 30 east of north. Next, it flies 58 km due south. Finally, it flies 100 km 30 north of west. Using
More informationChapters 56. Dynamics: Forces and Newton s Laws of Motion. Applications
Chapters 56 Dynamics: orces and Newton s Laws of Motion. Applications That is, describing why objects move orces Newton s 1 st Law Newton s 2 nd Law Newton s 3 rd Law Examples of orces: Weight, Normal,
More informationAP C  Webreview ch 7 (part I) Rotation and circular motion
Name: Class: _ Date: _ AP C  Webreview ch 7 (part I) Rotation and circular motion Multiple Choice Identify the choice that best completes the statement or answers the question. 1. 2 600 rev/min is equivalent
More informationUniversity Physics (Prof. David Flory) Chapt_06 Saturday, October 06, 2007 Page 1
University Physics (Prof. David Flory) Chapt_06 Saturday, October 06, 2007 Page 1 Name: Date: 1. A crate resting on a rough horizontal floor is to be moved horizontally. The coefficient of static friction
More informationCircular Motion PreTest
Circular Motion PreTest Date: 06/03/2008 Version #: 0 Name: 1. In a series of test runs, a car travels around the same circular track at different velocities. Which graph best shows the relationship between
More informationPYP 001 FIRST MAJOR EXAM CODE: TERM: 151 SATURDAY, OCTOBER 17, 2015 PAGE: 1
TERM: 151 SATURDAY, OCTOBER 17, 2015 PAGE: 1 *Read the following (20) questions and choose the right answer: 1 The figure below represents the speedtime graph for the motion of a vehicle during a 7.0minute
More informationTwentieth SLAPT Physics Contest Southern Illinois University Edwardsville April 30, Mechanics Test
Twentieth SLAPT Physics Contest Southern Illinois University Edwardsville April 30, 2005 Mechanics Test Please answer the following questions on the supplied answer sheet. You may write on this test booklet,
More informationCIRCULAR MOTION AND GRAVITATION
CIRCULAR MOTION AND GRAVITATION An object moves in a straight line if the net force on it acts in the direction of motion, or is zero. If the net force acts at an angle to the direction of motion at any
More informationUNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics
UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics Physics 111.6 MIDTERM TEST #2 November 16, 2000 Time: 90 minutes NAME: STUDENT NO.: (Last) Please Print (Given) LECTURE SECTION
More informationA) more mass and more inertia C) the same as the magnitude of the rock's weight C) a man standing still on a bathroom scale
1. A 15kilogram cart is at rest on a horizontal surface. A 5kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cartbox system has A) more mass and more inertia B)
More information1. Which one of the following situations is an example of an object with a nonzero kinetic energy?
Name: Date: 1. Which one of the following situations is an example of an object with a nonzero kinetic energy? A) a drum of diesel fuel on a parked truck B) a stationary pendulum C) a satellite in geosynchronous
More informationOnline homework #6 due on Tue March 24
Online homework #6 due on Tue March 24 Problem 5.22 Part A: give your answer with only 2 significant digits (i.e. round answer and drop less significant digits) 51 Equilibrium Question 52 1 Using Newton
More informationPractice 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 informationChapter 4. Dynamics: Newton s Laws of Motion. That is, describing why objects move
Chapter 4 Dynamics: Newton s Laws of Motion That is, describing why objects move orces Newton s 1 st Law Newton s 2 nd Law Newton s 3 rd Law Examples of orces: Weight, Normal orce, Tension, riction reebody
More informationPage 2. Q1.A satellite X is in a circular orbit of radius r about the centre of a spherical planet of mass
Q1. satellite X is in a circular orbit of radius r about the centre of a spherical planet of mass M. Which line, to, in the table gives correct expressions for the centripetal acceleration a and the speed
More informationPHYS 101 Previous Exam Problems. Force & Motion I
PHYS 101 Previous Exam Problems CHAPTER 5 Force & Motion I Newton s Laws Vertical motion Horizontal motion Mixed forces Contact forces Inclines General problems 1. A 5.0kg block is lowered with a downward
More informationThe net force on a moving object is suddenly reduced to zero. As a consequence, the object
The net force on a moving object is suddenly reduced to zero. As a consequence, the object (A) stops abruptly (B) stops during a short time interval (C) changes direction (D) continues at a constant velocity
More informationLAHS Physics Semester 1 Final Practice Multiple Choice
LAHS Physics Semester 1 Final Practice Multiple Choice The following Multiple Choice problems are practice MC for the final. Some or none of these problems may appear on the real exam. Answers are provided
More informationShow all workings for questions that involve calculations. No marks will be given for correct answers that are not supported by calculations.
Assignment 8 Unit 2 Newton s Laws (Outcomes 3255, 3258) Name: Multiple Choice: Show all workings for questions that involve calculations. No marks will be given for correct answers that are not supported
More informationChoose the best answer for Questions 115 below. Mark your answer on your scantron form using a #2 pencil.
Name: ID #: Section #: PART I: MULTIPLE CHOICE QUESTIONS Choose the best answer for Questions 115 below. Mark your answer on your scantron form using a #2 pencil. 1. A 55.0kg box rests on a horizontal
More informationName Period Date. Record all givens, draw a picture, arrow all vectors, write the formula, substitute and solve. units
Example Problems 5.2 Friction E1. A monkey is dragging a box full of books from his office to his car. The combined weight of the box and books is 134 N. If the coefficient of static friction between the
More informationPhys 1401: General Physics I
1. (0 Points) What course is this? a. PHYS 1401 b. PHYS 1402 c. PHYS 2425 d. PHYS 2426 2. (0 Points) Which exam is this? a. Exam 1 b. Exam 2 c. Final Exam 3. (0 Points) What version of the exam is this?
More informationPreparing for Six Flags Physics Concepts
Preparing for Six Flags Physics Concepts uniform means constant, unchanging At a uniform speed, the distance traveled is given by Distance = speed x time At uniform velocity, the displacement is given
More informationProficient. a. The gravitational field caused by a. The student is able to approximate a numerical value of the
Unit 6. Circular Motion and Gravitation Name: I have not failed. I've just found 10,000 ways that won't work. Thomas Edison Big Idea 1: Objects and systems have properties such as mass and charge. Systems
More informationLecture Presentation. Chapter 4 Forces and Newton s Laws of Motion. Chapter 4 Forces and Newton s Laws of Motion. Reading Question 4.
Chapter 4 Forces and Newton s Laws of Motion Lecture Presentation Chapter 4 Forces and Newton s Laws of Motion Chapter Goal: To establish a connection between force and motion. Slide 42 Chapter 4 Preview
More informationSPH4U Sample Test Dynamics
1of14 True/False Indicate whether the sentence or statement is true or false. 1. The normal force that acts on an object is always equal in magnitude and opposite in direction to the gravitational force
More informationPhys , Fall04,Term 1 Exercise Problems
Page 1 1. The number of significant figures in the number 0.00593 is a. 5 b. 2 c. 3 d.6 2. The product of 104 and 105 is a. 1 b. 10 c. 0.1 d.100 3. The length of a car is given as 4.57 m. The percent
More information1. A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of
1. A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of friction.] A) Its vertical speed remains the same, and its horizontal
More informationPHYS 124 Section A1 MidTerm Examination Spring 2006 SOLUTIONS
PHYS 14 Section A1 MidTerm Examination Spring 006 SOLUTIONS Name Student ID Number Instructor Marc de Montigny Date Monday, May 15, 006 Duration 60 minutes Instructions Items allowed: pen or pencil, calculator
More informationName Date Period PROBLEM SET: ROTATIONAL DYNAMICS
Accelerated Physics Rotational Dynamics Problem Set Page 1 of 5 Name Date Period PROBLEM SET: ROTATIONAL DYNAMICS Directions: Show all work on a separate piece of paper. Box your final answer. Don t forget
More information1. A 7.0kg bowling ball experiences a net force of 5.0 N. What will be its acceleration? a. 35 m/s 2 c. 5.0 m/s 2 b. 7.0 m/s 2 d. 0.
Newton's Laws 1. A 7.0kg bowling ball experiences a net force of 5.0 N. What will be its acceleration? a. 35 m/s 2 c. 5.0 m/s 2 b. 7.0 m/s 2 d. 0.71 m/s 2 2. An astronaut applies a force of 500 N to an
More informationAngular Speed and Angular Acceleration Relations between Angular and Linear Quantities
Angular Speed and Angular Acceleration Relations between Angular and Linear Quantities 1. The tires on a new compact car have a diameter of 2.0 ft and are warranted for 60 000 miles. (a) Determine the
More informationChapter 6 Study Questions Name: Class:
Chapter 6 Study Questions Name: Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. A feather and a rock dropped at the same time from
More informationAP Physics 1 Lesson 9 Homework Outcomes. Name
AP Physics 1 Lesson 9 Homework Outcomes Name Date 1. Define uniform circular motion. 2. Determine the tangential velocity of an object moving with uniform circular motion. 3. Determine the centripetal
More informationAP Physics 1 Work Energy and Power Practice Test Name
AP Physics 1 Work Energy and Power Practice Test Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two objects, one of mass m and the other
More information3/10/2019. What Is a Force? What Is a Force? Tactics: Drawing Force Vectors
What Is a Force? A force acts on an object. A force requires an agent, something that acts on the object. If you throw a ball, your hand is the agent or cause of the force exerted on the ball. A force
More informationW = 750 m. PHYS 101 SP17 Exam 1 BASE (A) PHYS 101 Exams. The next two questions pertain to the situation described below.
PHYS 101 Exams PHYS 101 SP17 Exa BASE (A) The next two questions pertain to the situation described below. A boat is crossing a river with a speed to the water. The river is flowing at a speed W = 750
More information