英語翻譯 A skier travelling in a straight line up a hill experiences a constantdeceleration.Atthe bottom of the hill，the skier has a speed of 16m/s and，after moving up the hill for 40 s，he comes to rest. Find: a.the deceleration of the skier. b.the distance from the bottom of the hill to the point where the skier comes to rest.

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