Write true or false for the following statements: Work done by centripetal force is zero.

Question

Write true or false for the following statements: 

Work done by the centripetal force is zero.

Answer 1

True 

Explanation: Whenever a body is moving in a circular path, centripetal force is directed towards the center of circle and it acts at right angle to the direction of motion. 

When force is applied at an angle to the direction of motion of object then the work in the direction of motion is given by: W = F × s cos θ 

If angle θ is 90º then cos θ will be equal to zero. 

So, work done will also be zero