Question

A body of mass 1 kg is rotating in a circular path of radius 1 m with constant velocity of 5 rev/sec. The work done in one complete revolution is
a. 5 J
b. 2.5 J
c.12.5 J
d. 0​

Answer 1

Answer:

0

Explanation:

Because, we know that, the work W=FscosФ

Here, centripetal force is acting towards the centre of the circular path and velocity is tangential, ie, displacement is tangential. Thus the angle between force and displacement is 90°.

 ∴Work, W=Fscos90

                 =0