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1) A newt accelerates from rest it's momentum increases by a certain amount and the momentum of the Earth changes by: a) A larger amount b) The same amount c) A smaller amount d) It depends on the values 2) The entire population of the world gathers in one spot and everyone jumps up. While all the people are in the air, does Earth gain momentum in the opposite direction? a) No because the Earth's mass is too large b) Yes, but by a lesser amount because of Earths mass c) Yes, by the same amount d) It depends on the values 3) About a second later, 6.5 billion people land back on the ground. After the people have landed, Earth's momentum is: a) The same as it was before the jump b) Different to what it was before the jump 4) rain falls vertically into an open cart rolling along a straight horizontal track with negligible friction. As a result of the accumulating water: a) momentum of the cart increases, and the kinetic energy of the cart increases b) momentum of the cart does not change ,and the kinetic energy of the cart increases. c) momentum of the cart increases, and the kinetic energy of the cart does decreases d) momentum of the cart does not change , and the kinetic energy of the cart decreases e) momentum of the cart decreases, and the kinetic energy of the cart increases f) momentum of the cart decreases, and the kinetic energy of the cart decreases 5) Consider two carts, of masses m and 2m, at rest on an air track. If you push first one cart for 3 s and then the other for the same length of time, exerting equal force on each, the momentum of the light cart is ......... the momentum of the heavy cart a) Four times b) Twice c) Equal to d) Half e) A quarter 6) Consider two carts, of masses m and 2m, at rest on an air track. If you push first one cart for 3 s and then the other for the same length of time, exerting equal force on each, the kinetic energy of the light cart is ........ the kinetic energy of the heavy cart a) Larger than b) Equal to c) Smaller than 7) Suppose a ping-pong ball and a bowling ball are rolling toward you. Both have the same momentum, and you exert the same force to stop each. How do the time intervals to stop them compare? a) Less time to stop the ping-pong ball b) More time to stop the ping-pong ball c) Both take the same time 8) A cart moving at speed v collides with an identical stationary cart on an air track, and the two stick together after the collision. What is their velocity after colliding? a) v b) 0.5v c) zero d) -v e) 2v f) need more information 9) A person attempts to knock down a large wooden bowling pin by throwing a ball at it. The person has two balls of equal size and mass, one made of rubber and the other of putty. The rubber ball bounces back, while the ball of putty sticks to the pin. Which ball is most likely to topple the bowling pin? a) Rubber ball b) Putty ball c) Makes no difference d) Need more information 10) Cart A is at rest. An identical cart B, moving to the right, collides with cart A. They stick together. After the collision, which of the following is true? a) Carts A and B are both at rest. b) Carts A and B move to the right with a speed greater than cart B's original speed. c) Carts A and B move to the right with a speed less than cart B's original speed. d) Carts A and B move to the right with speed equal to the original speed of cart B.

by Anonymous