Four men lift a 400 kg box to a height of 2m and hold it without raising or lowering it. How much work is done by the men in lifting the box?
( Assume g= 2 10ms− )
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Four men lift a 400 kg box to a height of 2m and hold it without raising or lowering it. How much work is done by the men in lifting the box?
( Assume g= 2 10ms− )
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