作者chenkaihsu (Shrek)
看板Physics
标题[题目] 普物一题
时间Sat Nov 1 23:45:52 2008
[领域] 大一普物 (题目相关领域)
[来源] 课本 (课本习题、考古题、参考书...)
[题目] An object of mass m is traveling on a horizontal surface. There is a
coefficient of kinetic friction 摩差系数b between the object and the surface. The
object has speed v when it reaches x=0 and encounters a spring. The object
compresses the spring, stops, and then recoils and travels in the opposite
direction. When the object reaches x=0 on its return trip, it stops.
Find k in terms of b mg v
[瓶颈] (写写自己的想法，方便大家为你解答)
我列式出来是 1/2*mv^2=bmgd+1/2*kd^2(设d为压缩距离)但我解不出来....有2ㄍ未知数
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