Question

a stone of mass 2 kg attached to the and of a string of length 4.5m is whirled in a circle the value of work done in it by the string is​

Answer 1

The Work done is zero because the intial and the final position of the String is same i.e.Displacement is zero.So,

We know,

Work done = FS Cos theta

= F * 0 * Cos theta

=0

Here,

F =Force

S =Displacement

Hope my answer helped you....