A body of mass 100 gm is rotating in a circular path of radius r with constant speed. The work done in one complete revolution is-

100 r J

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\frac{r}{100}

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\frac{100}{r}

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zero

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Solution

The correct option is C zero
the only force acting on the body is centripetal force, and it is a central force. Thus is conservative. Now, net displacement is zero. Thus total work done = 0 since net displacement is zero.(Since all forces are conservative)

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