You use a rope to slowly pull a sled and its passenger 50 m up a 20? incline, exerting a 150-N force on the rope. (a) How much work will you do if you pull parallel to the hill? (b) How much work will you do if you exert the same magnitude force while slowly lowering the sled back down the hill and pulling parallel to the hill? (c) How much work did Earth do on the sled for the trip in part (b)?
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