Calculate the net work done by the force


A weightlifter lifts a weight of mass 50.0 kg through a distance of 0.680 m, then lowers it gently. He does this 27 times. Calculate the net work done by the force of friction due to the rope rubbing on the support Ff = 135 N). Assume that friction is the only non-conservative force acting.

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Physics: Calculate the net work done by the force
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