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壓縮彈簧x需施力F,作功W,則在彈性限度內再壓縮x,需再作功多少? (A)W(B)2W (C)3W (D)Fx(E)3Fx/2。【70夜大】
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Posted in 功與變力作功.
Tagged with 彈力, 變力作功.
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By admin – 2009 年 03 月 25 日
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