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弹性势能不会求……

Posted by Fukuphysics at 2005-07-06 15:12:27 on Problem 2463
In Reply To:Re:从能量角度，初始重力势能 == 末动能 + 弹性势能，就这个公式 Posted by:Fukuphysics at 2005-07-06 14:45:59 
1不会公式，2不会求伸长量……
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