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Does Work Depends on Frame of Reference ? Give an example.

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With change of frame of reference (inertial) force does not change while displacement may change. So the work done by a force will be different in different frames.

Examples : If a person is pushing a box inside a moving train, the work done in the frame of train will

while in the frame of earth will be 

where vector s0 is the displacement of the train relative to the ground.

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