Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The total momentum before a collision is equal to the total momentum after the collision. A. This is true only for collisions between objects moving in the same direction. B. This is true for elastic collisions but not for inelastic collisions. C. This is true for any collision. D. This is not true for any collisions. E. This is true for inelastic collisions but not for elastic collisions. 2. An elastic collision is one in which A. no lasting deformation of either object occurs. B. both of the two colliding objects are made of a rubbery material. C. lasting deformation occurs for both of the colliding objects. D. lasting deformation occurs for one of the two colliding objects. E. one of the two colliding objects is made of a rubbery material. 3. An inelastic collision is one in which A. both of the two colliding objects are made of a very rigid material. both of the two colliding objects are made of a rubbery material. the two colliding objects deform, generate heat, or stick together. D. no lasting deformation of either object occurs. E. one of the two colliding objects is made of a rubbery material. 4. Which of these is the most accurate statement about momentum in a collision between two objects? A. Momentum is only conserved if the colliding objects bounce apart. B. Momentum is only conserved if the collision is elastic. C. Momentum is never conserved. D. Momentum is always conserved. E. Momentum is only conserved if the collision is inelastic. 5. A freight car moving at 20 m/s to the right strikes a stationary freight car of the same mass. If the collision is inelastic, A. the first car will move left and the second car will move right, both at 20 m/s. B. the first car will stop and the second car will move away at 20 m/s to the right. C. the first car will move left and the second car will move right, both at 10 m/s. D. both cars will move together to the right at 20 m/s. E. both cars will move together to the right at 10 m/s. 6. A freight car moving at 20 m/'s to the right strikes a stationary freight car of the same mass. If the collision is elastic, A. the first car will move left and the second car will move right, both at 10 m/s. B. the first car will stop and the second car will move away at 20 m/s to the right. C. both cars will move together to the right at 10 m/s. D. both cars will move together to the right at 20 m/s. E. the first car will move left and the second car will move right, both at 20 m/s.7. A green ball moving to the right at 3 m/s strikes a yellow ball moving to the left at 2 m/s. If the balls are equally massive and the collision is elastic, A. the green ball will move to the left at 2 m/s while the yellow ball moves right at 3 m/s. B. Both balls will stick together and move to the right at 1 m/s. C. The yellow ball will stop while the green ball moves left at 3 m/s. D. the green ball will move to the left at 3 m/s while the yellow ball moves right at 2 m/s. E. The green ball will stop while the yellow ball moves right at 2 m/'s. 8. A green ball moving to the right at 3 m/s strikes a yellow ball moving to the left at 2 m/s. If the balls are equally massive and the collision is inelastic, A. Both balls will stick together and move to the right at 1 m/s. B. The yellow ball will stop while the green ball moves left at 3 m/s. C. The green ball will stop while the yellow ball moves right at 2 m/s. D. the green ball will move to the left at 2 m/s while the yellow ball moves right at 3 m/s. E. the green ball will move to the left at 3 m/s while the yellow ball moves right at 2 m/s. 9. A freight car moving at 30 m/s to the right strikes a stationary freight car of the same mass. If the two cars couple together, what will be their velocity after the collision? A. 30 m/'s to the right B. 15 m/s to the left C. 15 m/'s to the right D. 30 m/s to the left E. 0 m/s 10. A green ball moving to the right at 2 m/s strikes a yellow ball moving to the left at 3 m/s. If the balls are equally massive and the collision is elastic, A. the green ball will move to the left at 2 m/s while the yellow ball moves right at 3 m/s. . The yellow ball will stop while the green ball moves left at 1 m/s. C. the green ball will move to the left at 3 m/s while the yellow ball moves right at 2 m/s. D. The yellow ball will stop while the green ball moves left at 3 m/s. E. The green ball will stop while the yellow ball moves right at 2 m/s. 11. Impulse is the product of A. force and velocity. B. velocity and acceleration. C. mass and acceleration. D. force and time. E. force and inertia. 12. Impulse is equal to the change in . of the object on which the impulse acts. A. force. B. acceleration. C. velocity. D. momentum. E. mass.13. In order to minimize the force acting on your bare hand when you catch a baseball, you should A. move your hand toward the ball as you catch it. B. think happy thoughts while you catch the ball. C. keep your hand as motionless as possible as you catch the ball. D. let the ball bounce off your hand as you catch it. E. move your hand away from the ball as you catch it. 14. Impulse has the same units as A. time. B. force. C. momentum. D. acceleration. E. mass. 15. An impulse of 100 N-s is applied to an object. If this same impulse is delivered over a longer time interval, A. the acceleration involved will be increased. B. the force involved will be decreased. C. the momentum transferred will be decreased. the momentum transferred will be increased. E. the force involved will be increased. 16. An impulse of 100 N-s is applied to an object. If this same impulse is delivered over a shorter time interval, A. the acceleration involved will be decreased. B. the force involved will be increased. C. the momentum transferred will be increased. D. the momentum transferred will be decreased. E. the force involved will be decreased. 17. Whether you slam on the brakes or apply a steady, moderate pressure to the brake pedal, the required to bring your car to a stop will be the same. A. time. B. impulse. C. distance. D. force. acceleration. 18 is equal to the change in momentum of the object on which it acts. A. Mass B. Velocity C. Acceleration D. Impulse E. Force 19. When a bullet is fired from a rifle, A. the rifle exerts a lesser impulse on the bullet than the bullet exerts on the rifle. B. the rifle exerts a lesser force on the bullet than the bullet exerts on the rifle. C. the rifle and the bullet exert impulses of equal magnitude on each other. D. the rifle exerts a greater force on the bullet than the bullet exerts on the rifle. E. the rifle exerts a greater impulse on the bullet than the bullet exerts on the rifle.26. Momentum is the product of A. force and velocity. B. force and inertia. C. velocity and acceleration. D. mass and velocity. E. mass and acceleration. 27. If two speeding trucks have the same momentum, . they must have the same velocity. B. the more massive truck must have a greater speed. C. they must have the same acceleration. D. they must have the same mass. E. the more massive truck must have a lower speed. 28. When a bullet is fired from a rifle, A. the momentum of the bullet is zero. B. the momentum of the rifle is equal and opposite to the momentum of the bullet. C. the momentum of the bullet is greater than the momentum of the rifle. D. the momentum of the rifle is zero. E. the momentum of the rifle is greater than the momentum of the bullet. 29. When a bullet is fired from a rifle, A. the velocity of the rifle is zero. B. the velocity of the rifle is greater than the velocity of the bullet. C. the velocity of the bullet is zero. the velocity of the rifle is equal and opposite to the velocity of the bullet. E. the velocity of the bullet is greater than the velocity of the rifle. 30. If two speeding trucks have the same momentum, A. the less massive truck must have a lower speed. B. the less massive truck must have a greater speed. C. they must have the same mass. D. they must have the same acceleration. E. they must have the same velocity. 31. When a bullet is fired from a rifle, the rifle and the bullet have A. the same momentum, but the bullet has a greater inertia. B. the same inertia and the same momentum. C. the same inertia, but the rifle has a greater momentum. D. the same inertia, but the bullet has a greater momentum. E. the same momentum, but the rifle has a greater inertia. 32. The product of mass and velocity is called A. kinetic energy B. force C. impulse D. momentum E. collision33. If a moving object doubles its speed, how much momentum will it have? A. the same amount as before B. four times as much as before C. twice as much as before D. one half as much as before E. six times as much as before 34. If a moving object triples its speed, how much momentum will it have? A. six times as much as before B. one third as much as before C. the same amount as before D. nine times as much as before E. three times as much as before 35. If a moving object cuts its speed in half, how much momentum will it have? A. four times as much as before B. one fourth as much as before C. the same amount as before D. one half as much as before E. twice as much as before 36. A 1-kg ball moving horizontally to the right at 3 m/s strikes a wall and rebounds, moving horizontally to the left at the same speed. What is the magnitude of the change in momentum of the ball? A. 4 kg-m/s B. 6 kg-m/s C. 0 kg-m/s D. 2 kg-m/s E. 3 kg-m/s 37. A 2-kg ball moving horizontally to the right at 3 m/s strikes a wall and rebounds, moving horizontally to the left at the same speed. What is the magnitude of the change in momentum of the ball? A. 12 kg-m/s B. 0 kg-m/s C. 4 kg-m/s D. 6 kg-m/s F 18 kg-m/s 38. A mass of 12 kg moving to the right with a speed of 4 m/s would have a momentum of ___kg-m/s. A. 8 B. 16 C. 1/3 D. 48 E. 3 39. A mass of 2 kg moving to the right with a speed of 6 m/'s would have a momentum of __kg-m/s. A. 4 B. 12 C. 1/3 D. 8 w O40. A mass of 2 kg moving to the right with a momentum of 6 kg-m/s would have a speed of ___ m/s. 4 B. 1/3 C. 12 D. 3 E. 41. A mass of 3 kg moving to the right with a momentum of 12 kg-m/'s would have a speed of _ m/s. A. 36 B. 15 C. D. 9 E. 1/4 42. A mass of 2 kg moving to the right with a momentum of 8 kg-m/s would have a speed of ___ m/s. A. 10 B. 4 C. 16 D. 2 E. 43. A mass of 4 kg moving to the right with a momentum of 12 kg-m/s would have a speed of - m/s. A. 12 B. 4 48 D. 8 E. 3 44. Which of these is the most accurate statement about kinetic energy in a collision between two objects? A. Kinetic energy is only conserved if the colliding objects stick together. B. Kinetic energy is only conserved if the colision is inelastic. C. Kinetic energy is only conserved if the collision is elastic. D. Kinetic energy is always conserved. E. Kinetic energy is never conserved. 45. Which of these is the most accurate statement about kinetic energy in a collision between two objects? A. Kinetic energy is only conserved if the collision is inelastic. B. Kinetic energy is always conserved. C. Kinetic energy is never conserved. D. Kinetic energy is only conserved if the colliding objects bounce apart. E. Kinetic energy is only conserved if the colliding objects stick together. 46. If a collision between two bodies is elastic, A. the total momentum will be unchanged, but the total kinetic energy will be reduced. B. the total kinetic energy will be unchanged, but the total momentum will be reduced. C. both the total momentum and the total kinetic energy will be unchanged. D. each body will retain its original momentum after the collision. E. each body will retain its original kinetic energy after the collision.47. Potential energy is the energy possessed by an object due to its A. acceleration. B. momentum. C. velocity. D. shape. E. position. 48. Gravitational potential energy is the product of A. mass and acceleration. B. power and time. C. weight and height. D. force and distance. E. momentum and impulse. 49. The formula for kinetic energy is KE - A. my B. (1/2) mv C. D. Fd E. mgh 50. The formula for gravitational potential energy is PE - A. mgh B. ma C. mv D. (1/2) mv E. Fd 51. Which of the following is true? A. A body with zero velocity cannot have any potential energy. B. A body with zero acceleration cannot have any kinetic energy. C. A body with zero potential energy cannot have any velocity. D. A body with zero acceleration cannot have any potential energy. E. A body with zero velocity cannot have any kinetic energy. 52. The unit of energy is the joule, which is equal to a A. kg-m. B. kg/s. C. N/s. D. N-m/s. E. N-m. 53. The kinetic energy of a body depends on its A. mass and volume. B. shape and acceleration. C. shape and speed. D. acceleration and volume. E. mass and speed