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Q.

If a person is pushing a box inside a moving train, the work done in the frame of earth will be (Let s→0 is the displacement of train and s→ is the displacement of box in the train)

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a

F→.s→0

b

F→.s→

c

F→.(s→+s→0)

d

Zero

answer is C.

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Detailed Solution

Displacement of the box relative to the frame of earth will be s→+s→0 .Hence required work done W=F→(s→+s→0)

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