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範例:作功與重力位能

均勻鍊長L,質量m,置於光滑桌面,長度的1/4懸於桌外,(1)將之拉回桌上至少需作功多少?(2)若不拉回,而令其溜下,則末端離桌時速度為多少?(重力加速度為g)

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Posted in 重力位能.

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By admin – 2009 年 04 月 10 日

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