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英语翻译A skier travelling in a straight line up a hill experien

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英语翻译
A skier travelling in a straight line up a hill experiences a constant deceleration.At the 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.
一位滑雪运动员从山下往上滑雪,经历匀减速直线运动.在山下时速度为16米每秒,40秒后停止运动.求:
a 滑雪者的加速度
b 从山下到滑雪者停止处有多远