A boy held a book of 1 kg at a height of 1 metre for 60 seconds. Calculate the work done :

60 J

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30 J

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15 J

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Solution

The correct option is C 0
$w o r k d o n e = f o r c e \times d i s p l a c e m e n t$
Since the object did not move that means displacement is zero so work done is not considered to be done. Work done by the boy will be zero

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