Figure 1.01a: (a.)The surface of a single grain of table salt.

CRS Question, 6–3

QUESTION (continued)

1. After A collides with B, the final resting point of B is not as high as the original position of A because of friction.

2. Before A collides with B, it has a greater potential energy than B.

3. The amount of work done on B has lowered the potential energy of A.

4. If the paths of the collision were reversed, B would collide with A returning it to its original position.