A ball is traveling with uniform translatory motion. This means that:

1. it is at rest.
2. the path can be a straight line or circular and the ball travels with uniform speed.
3. all parts of the ball have the same velocity (magnitude and direction) and the velocity is constant.
4. the center of the ball moves with constant velocity and the ball spins about its center uniformly.

(c) Hint: Recall the concept of uniform motion.
Step 1: Find the type of motion of the body.
In a uniform translatory motion. all parts of the ball have the same velocity magnitude and direction and this velocity is constant.
The situation is shown in the adjacent diagram were a body. A is in uniform translatory motion.