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1 Name: Page 1 1) If a woman runs 100 meters north and then 70 meters south, her total displacement is A) 170 m south B) 170 m north C) 30 m south D) 30 m north 2) The graph below represents the motion of a body that is moving with A) decreasing acceleration B) increasing speed C) constant speed D) increasing acceleration 3) A baseball pitcher throws a fastball at 42 meters per second. If the batter is 18 meters from the pitcher, approximately how much time does it take for the ball to reach the batter? A) 1.9 s B) 0.43 s C) 2.3 s D) 0.86 s 4) The average speed of a plane was 600 kilometers per hour. How long did it take the plane to travel 120 kilometers? A) 0.7 hour B) 5 hours C) 0.5 hour D) 0.2 hour 5) A car travels between the 100.-meter and 250.-meter highway markers in 10. seconds. The average speed of the car during this interval is A) 10. m/s B) 35 m/s C) 15 m/s D) 25 m/s 6) A cart starting from rest travels a distance of 3.6 meters in 1.8 seconds. The average speed of the cart is A) 2.0 m/s B) 0.20 m/s C) 5.0 m/s D) 0.50 m/s 7) The graph below represents the motion of an object traveling in a straight line as a function of time. What is the average speed of the object during the first four seconds? A) 0 m/s B) 1 m/s C) 2 m/s D) 0.5 m/s 8) Which graph best represents the motion of an object sliding down a frictionless inclined plane? A) C) B) D)

2 9) Which graph best represents the motion of an object initially at rest and accelerating uniformly? Page 2 A) C) B) D) 10) The graph below represents the relationship between distance and time for an object in motion. During which interval is the speed of the object changing? A) CD B) DE C) BC D) AB 11) The diagram below represents a 20-newton force pulling an object up a hill at a constant rate of 2 meters per second. Which graph best represents the relationship between velocity and time for the object? A) C) B) D)

3 12) An object initially at rest accelerates at 5 meters per second 2 until it attains a speed of 30 meters per second. What distance does the object move while accelerating? A) 3 m B) 90 m C) 30 m D) 600 m 13) A child riding a bicycle at 15 meters per second decelerates at the rate of 3.0 meters per second 2 for 4.0 seconds. What is the child's speed at the end of the 4.0 seconds? A) 7.0 m/s B) 27 m/s C) 12 m/s D) 3.0 m/s 14) An object accelerates uniformly from rest to a speed of 50. meters per second in 5.0 seconds. The average speed of the object during the 5.0-second interval is A) 50. m/s B) 5.0 m/s C) 10. m/s D) 25 m/s 15) A ball is projected horizontally to the right from a height of 50. meters, as shown in the diagram below Page 3 Which diagram best represents the position of the ball at 1.0-second intervals? [Neglect air resistance.] A) B) C) D) Questions 16 and 17 refer to the following: A 10.-kilogram object, starting from rest, slides down a frictionless incline with a constant acceleration of 2.0 m/sec 2 for 4.0 seconds. 16) What is the velocity of the object at the end of the 4.0 seconds? A) 4.0 m/sec B) 2.0 m/sec C) 8.0 m/sec D) 16 m/sec 17) During the 4.0 seconds, the object moves a total distance of A) 8.0 m B) 16 m C) 4.0 m D) 32 m 18) A car is traveling at a constant speed of 14 meters per second along a straight highway. A tree and a speed limit sign are beside the highway. As it passes the tree, the car starts to accelerate. The car is accelerated uniformly at 2.0 meters per second 2 until it reaches the speed limit sign, 5.0 seconds later. When the car reaches the sign, the car's speed is A) less than the speed limit B) equal to the speed limit C) greater than the speed limit

4 19) Which statement explains why a book resting on a table is in equilibrium? A) The weight of the book and the table's upward force on the book are equal in magnitude, but opposite in direction. B) The weight of the book equals the weight of the table. C) The acceleration due to gravity is 9.8 m/s 2 for both the book and the table. D) There is a net force acting downward on the book. 20) The magnitude of the force that a baseball bat exerts on a ball is 50. newtons. The magnitude of the force that the ball exerts on the bat is A) 5.0 N B) 10. N C) 50. N D) 250 N 21) A test booklet is sitting at rest on a desk. Compared to the force of the booklet on the desk, the force of the desk on the booklet is A) greater B) the same C) less 22) A 5.0-kilogram cart moving with a velocity of 4.0 meters per second is brought to a stop in 2.0 seconds. The magnitude of the average force used to stop the cart is A) 2.0 newtons B) 4.0 newtons C) 10. newtons D) 20. newtons Page 4 23) A cart rolls down an inclined plane with constant speed as shown in the diagram below. Which arrow represents the direction of the frictional force? A) A B) B C) C D) D 24) A horizontal force is used to pull a 5.0-kilogram cart at a constant speed of 5.0 meters per second across the floor as shown in the diagram below. If the force of friction between the cart and the floor is 10. newtons, the magnitude of the horizontal force along the handle of the cart is A) 10. N B) 50. N C) 25 N D) 5.0 N 25) A force of 50. newtons causes an object to accelerate at 10. meters per second squared. What is the mass of the object? A) 0.20 kg B) 60. kg C) 500 kg D) 5.0 kg

5 26) In the graph below, the acceleration of an object is plotted against the unbalanced force on the object Page 5 What is the object's mass? A) 1 kg B) 2 kg C) 0.2 kg D) 0.5 kg 27) An 800-newton person is standing in an elevator. If the upward force of the elevator on the person is 600 newtons, the person is A) at rest B) accelerating upward C) accelerating downward D) moving downward at constant speed 28) A 50.0-kilogram object in outer space is attracted to a nearby planet with a net force of 400. newtons. What is the magnitude of the object's acceleration? A) 9.81 m/s 2 B) 8.00 m/s 2 C) 78.4 m/s 2 D) 2,000 m/s 2 29) The graph below represents the velocity-time relationship for a 2.0-kilogram mass moving along a horizontal frictionless surface. The net force on the mass during interval DE is A) 2.0 N B) 4.0 N C) 0 N D) 1.0 N 30) If the mass of a moving object could be doubled, the inertia of the object would be A) quadrupled B) unchanged C) halved D) doubled 31) A net force of 5.0 newtons moves a 2.0-kilogram object a distance of 3.0 meters in 3.0 seconds. How much work is done on the object? A) 10. J B) 15 J C) 1.0 J D) 30. J 32) A 2.2-kilogram mass is pulled by a 30.-newton force through a distance of 5.0 meters as shown in the diagram below. What amount of work is done? A) 66 J B) 11 J C) 330 J D) 150 J

6 Page 6 33) In the diagram below, 55 joules of work is needed to raise a 10.-newton weight 5.0 meters at a constant speed. How much work is done to overcome friction as the weight is raised? A) 5 J B) 50. J C) 11 J D) 5.5 J 34) Which term is a unit of power? A) newton B) watt C) joule D) hertz 35) A motor has an output of 1,000 watts. When the motor is working at full capacity, how much time will it require to lift a 50-newton weight 100 meters? A) 50 s B) 10 s C) 5 s D) 100 s 36) Which mass has the greatest potential energy with respect to the floor? A) 50-kg mass resting on the floor B) 6-kg mass 5 meters above the floor C) 10-kg mass 2 meters above the floor D) 2-kg mass 10 meters above the floor 37) Which graph best represents the relationship between potential energy (PE) and height above ground (h) for a freely falling object released from rest? A) C) B) D) 38) A mass resting on a shelf 10.0 meters above the floor has a gravitational potential energy of 980. joules with respect to the floor. The mass is moved to a shelf 8.00 meters above the floor. What is the new gravitational potential energy? A) 490. J B) 960. J C) 196 J D) 784 J

7 39) Three people of equal mass climb a mountain using paths A, B, and C shown in the diagram below Page 7 Along which path(s) does a person gain the greatest amount of gravitational potential energy from start to finish? A) A, only B) The gain is the same along all paths. C) B, only D) C, only 40) The diagram below represents a flat racetrack as viewed from above, with the radii of its two curves indicated. A car with a mass of 1,000 kilograms moves counterclockwise around the track at a constant speed of 20 meters per second. Compared to the kinetic energy of the car while moving from A to D, the kinetic energy of the car while moving from D to C is A) the same B) greater C) less 41) Which cart shown below has the greatest kinetic energy? A) C) B) D) 42) The graph below represents the velocity-time relationship for a 2.0-kilogram mass moving along a horizontal frictionless surface. The kinetic energy of the mass is greatest during interval A) BC B) DE C) CD D) AB

8 43) A 10.-kilogram object and a 5.0-kilogram object are released simultaneously from a height of 50. meters above the ground. After falling freely for 2.0 seconds, the objects will have different A) displacements B) accelerations C) kinetic energies D) speeds Page 8 44) Which graph best represents the relationship between the kinetic energy (KE) of a moving object as a function of its velocity (v)? A) C) B) D) 45) The diagram below represents a 2.0-kilogram mass placed on a frictionless track at point A and released from rest. Assume the gravitational potential energy of the system to be zero at point E. If the mass were released from rest at point B, its speed at point C would be A) 0 m/sec B) 10. m/sec C) 0.50 m/sec D) 14 m/sec 46) Energy is measured in the same units as A) momentum B) power C) work D) force 47) The work done in raising an object must result in an increase in the object's A) heat energy B) kinetic energy C) internal energy D) gravitational potential energy 48) As an object falls freely near the Earth's surface, the loss in gravitational potential energy of the object is equal to its A) loss of height B) gain in kinetic energy C) gain in velocity D) loss of mass 49) At what point in its fall does the kinetic energy of a freely falling object equal its potential energy? A) at the end of the fall B) at the start of the fall C) halfway between the start and the end D) at all points during the fall

9 Page 9 50) As the pendulum swings from position A to position B as shown in the diagram below, what is the relationship of kinetic energy to potential energy? [Neglect friction.] A) The kinetic energy increase is equal to the potential energy decrease. B) The kinetic energy increase is more than the potential energy decrease. C) The kinetic energy decrease is equal to the potential energy increase. D) The kinetic energy decrease is more than the potential energy increase. 51) A basketball player who weighs 600 newtons jumps 0.5 meter vertically off the floor. What is her kinetic energy just before hitting the floor? A) 30 J B) 600 J C) 60 J D) 300 J Questions 52 and 53 refer to the following: The diagram below represents a 2.0-kilogram mass placed on a frictionless track at point A and released from rest. Assume the gravitational potential energy of the system to be zero at point E. 52) As the mass travels along the track, the maximum height it will reach above point E will be closest to A) 30. m B) 10. m C) 40. m D) 20. m 53) Compared to the total mechanical energy of the system at point A, the total mechanical energy of the system at point F is A) more B) the same C) less 54) A 3.0-kilogram mass is traveling in a circle of 0.20-meter radius with a speed of 2.0 meters per second. What is its centripetal acceleration? A) 10. m/s 2 B) 6.0 m/s 2 C) 60. m/s 2 D) 20. m/s 2 55) The diagram below represents a ball undergoing uniform circular motion as it travels clockwise on a string. At the moment shown in the diagram, what are the correct directions of both the velocity and centripetal acceleration of the ball? A) B) C) D)

10 56) The diagram below shows an object traveling clockwise in a horizontal, circular path at constant speed Page 10 Which arrow best shows the direction of the centripetal acceleration of the object at the instant shown? A) B) C) D) 57) A motorcycle of mass 100 kilograms travels around a flat, circular track of radius 10 meters with a constant speed of 20 meters per second. What force is required to keep the motorcycle moving in a circular path at this speed? A) 400 N B) 2000 N C) 200 N D) 4000 N Questions 58 through 60 refer to the following: The diagram below shows a 5.0-kilogram cart traveling clockwise in a horizontal circle of radius 2.0 meters at a constant speed of 4.0 meters per second. 58) At the position shown, the velocity of the cart is directed toward point A) P B) S C) R D) Q 59) At the position shown, the centripetal acceleration of the cart is directed toward point A) P B) S C) Q D) R 60) What is the magnitude of the centripetal force acting on the cart? A) 40. N B) 8.0 N C) 50. N D) 20. N

11 Questions 61 and 62 refer to the following: Page 11 The diagram below represents a ball of mass M attached to a string. The ball moves at a constant speed around a flat horizontal circle of radius R. 61) The centripetal acceleration of the ball is A) changing in both magnitude and direction B) constant in magnitude, but changing in direction C) constant in direction, but changing in magnitude D) zero 62) If the mass of the ball is decreased, the centripetal force required to keep it moving in the same circle at the same speed A) increases B) remains the same C) decreases Questions 63 and 64 refer to the following: The diagram below represents a flat racetrack as viewed from above, with the radii of its two curves indicated. A car with a mass of 1,000 kilograms moves counterclockwise around the track at a constant speed of 20 meters per second. 63) The net force acting on the car while it is moving from D to C is A) 4,000 N B) 0 N C) 20,000 N D) 200 N 64) Compared to the centripetal acceleration of the car while moving from B to A, the centripetal acceleration of the car while moving from D to C is A) the same B) one-half as great C) 4 times greater D) twice as great

12 Page 12 65) The diagram below represents a simple pendulum with a 2.0-kilogram bob and a length of 10. meters. The pendulum is released from rest at position 1 and swings without friction through position 4. At position 3, its lowest point, the speed of the bob is 6.0 meters per second. At position 4, the centripetal force of the bob is directed toward point A) A B) B C) C D) D 66) The diagram below shows a 2.0-kilogram model airplane attached to a wire. The airplane is flying clockwise in a horizontal circle of radius 20. meters at 30. meters per second. If the wire breaks when the airplane is at the position shown, the airplane will move toward point A) A B) B C) C D) D

13 Questions 67 and 68 refer to the following: Page 13 A 4.0-kilogram model airplane travels in a horizontal circular path of radius 12 meters at a constant speed of 6.0 meters per second. 67) What is the magnitude of the centripetal acceleration of the airplane? A) 2.0 m/s 2 B) 12 m/s 2 C) 0.50 m/s 2 D) 3.0 m/s 2 68) At the position shown, what is the direction of the net force acting on the airplane? A) east B) west C) north D) south