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一長3L,質量可忽略的輕桿,兩端各附著質量m,2m的質點,在距m長L處以水平軸O支持,如右圖,今由水平位置釋放,當輕桿擺動至鉛直位置時,m、2m的速度各為若干?
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Posted in 重力位能.
Tagged with 力學能守恆, 動能, 轉動.
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By admin – 2009 年 04 月 10 日
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