or

Why is a force necessary to keep a body moving with a uniform speed in a circular motion?

Why is a force necessary to keep a body moving with a uniform speed in a circular motion?

When a body is moving in a circle with uniform motion, its linear velocity will change continuously. Since the magnitude of the velocity does not change, the change in the velocity is due to the change in its direction. This change in velocity gives rise to a changing momentum. According to Newton's second law of motion, to bring any change in momentum, a force is required. Therefore centripetal force is required to keep the body in the circular motion. 

Close Open App