Question

Work done by the centripetal force is always .....................

• A. zero
• B. Infinity
• C. more than zero
• D. non of these

Answer 1

The correct option is A zero

we know centripetal acceleration is:Any motion in a curved path represents accelerated motion, and requires a force directed towards the centre of curvature of the path.
according to definition:work is done whenever the given condition is satisfied.
(i) a force should act on an object
(ii) there is a displacement of the body caused by the applied force along the direction of the applied force.
No displacement takes place in this case.
so,Work done by a centripetal force is always zero