Question

In case of circular motion of a body, if tangential force also acts on the body in addition to centripetal force, then work done:

• A. by both the forces is zero
• B. by both the forces is positive
• C. by centripetal force is zero but work done by tangential force is not zero
• D. by tangential force is zero by work done by centripetal force is not zero

Answer 1

Answer: (C)

In circular motion centripetal force is always perpendicular to instantaneous displacement, whereas tangential force is along the displacement.