Question

when an object moves on a circular path what is the work done

Answer 1

Throughout the circular path there at infinitely many points through which the object travels.
So at every point the object will be tangential to the core or the centre of the circular path.
So the angle will be 90 degrees.
Now,
Work done = Force*displacement* cos theta
Here theta = 90
But cos 90 =

So work done = F*s*0
= 0 joules

So the work done will be 0.

Answer 2

work done will be zero