Question

a stone is tied to a string and whirled in a circular path the work done by the stone is

Answer 1

When a stone is going around a circular path, the instantaneous velocity of stone is acting as tangent to the circle. When the string breaks, the centripetal force stops to act. Due to inertia, the stone continues to move along the tangent to circular path. So, the stone flies off tangentially to the circular path

Answer 2

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Work done by the stone is zero.

As,

Work done = FScos theta

Here, in circulation path displacement is zero.

Also tangential velocity makes angle 90°.

Cos 90°=0

So wor on done is zero