Final answer:
Uniform circular motion is when an object travels on a circular path at a constant speed. The centripetal force is responsible for maintaining the circular motion.
Step-by-step explanation:
C. Uniform circular motion is when an object travels on a circular path at a constant speed.
In uniform circular motion, the object moves in a circle at a constant speed. The magnitude of its velocity remains constant, but the direction of the velocity is changing. This means that there is a centripetal acceleration present, caused by a net external force called the centripetal force.
Example: A car moving around a banked curve at a constant speed experiences uniform circular motion because it travels in a circular path at a constant velocity.