University:
Amherst College
Course:
PHYS 116 | Introductory Physics I: Mechanics
Academic year:

2004
Views:

306

Pages:

5
Author:

constibarsjz

A big ball, mass M=10m, speed v, strikes a small ball, mass m, at rest. Could the following occur: The big ball comes to a complete stop and the small ball takes off with speed 10v? 10 m v m m 10Mm 10v A: Yes, this can occur. B: No, it cannot occur because it would violate momentum conservation C: No, it cannot occur because it would violate conservation of energy. Two people on roller blades throw a ball back and forth. After a couple of throws, when the first thrower once again is holding the ball, they are (ignore friction) A: standing still, where they were initially. B: standing still, farther away from each other. C: standing still, closer together than initially. D: moving away from each other. E: moving toward each other. If all three collisions in the figure shown here are totally inelastic, which bring(s) the car on the left to a halt? A: I D: II,III only B: II E: All three. C: III Suppose you are on a cart, initially at rest on a track with very little friction. You throw balls at a partition that is rigidly mounted on the cart. If the balls bounce straight back as shown in the figure, is the cart put in motion? A: Yes, it moves to the right. B: Yes, it moves to the left. C: No, it remains in place.

Collisions

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