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21 Momentum and Impulse

# 21 Momentum and Impulse - A truck and a car are moving...

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A truck and a car are moving along the road with equal momentum. Each driver hits the brakes. If both vehicles stop in the same time, which brakes applied the greater force? a) The truck’s brakes. b) The car’s brakes. c) The forces were equal.
A ball is moving toward a non-ideal spring. When it hits the spring, it compresses it a certain distance, before it stops. Given the force vs. time graph below, determine the initial momentum of the ball. 10N 2 sec. F t

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A table is set with all sorts of fine china. You grab hold of the tablecloth and pull it out from under the china very quickly. What happens? a) The china does not move. b) The china moves toward you a little. c) The china comes crashing off the table.
A rod is placed in the hole of a block of wood. If the rod is held vertical and hit from the top, which way does the wood move. a) It moves up the rod. b) It moves down the rod. c) It does not move up or down the rod.

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A stick hangs from a metal ball, which hangs from the ceiling. In the first experiment,
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21 Momentum and Impulse - A truck and a car are moving...

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