Question

An object moves in a circle at constant speed. The work done by the centripetal force is zero because:

• A. the displacement for each revolution is zero
• B. the average force for each revolution is zero
• C. the magnitude of the acceleration is zero
• D. the centripetal force is perpendicular to the velocity

Answer 1

The correct option is D the centripetal force is perpendicular to the velocity

The centripetal force always acts perpendicular to the velocity of body.

Hence work done by body by centripetal force is zero