A box is pushed through a distance of 4 m across a floor offering 100n resistance. How much work is done by the resisting force ?
Text Solution
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The force of friction action on the box, F = 100 N The displacement of the box, s = 4m The force and displacement are in opposite directions. Hence work done on the box is negative. That is, W =-Fs = `100 times 4` = - 400 J
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