You lift a box weighing 200 N from the floor to a shelf 1.5 m above. (a) What is the maximum work done by the force you exert on the box ? (b) When would the work be greater then this maximum ?
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(a) W = Fs = (200 N) (1.5 m) = 300 J
(b) if you lift quickly by exerting a force greater then 200 ngt