(Answered) Question in the sport of skeleton a participant slides down

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Question: In the sport of skeleton a participant slides down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 132 m in elevation from top to bottom. The gold-medal winner (Canadian Jon Montgomery) reached the bottom in one run with a speed of 40.5 m/s (about 91 mi/h). How much work was done on him and his sled (assuming a total mass of 118 kg) by non-conservative forces during this run?

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