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欲使質量m的物體,沿傾斜角θ,摩擦係數μk的斜面等速上滑,m滑行S須作功若干?
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Posted in 功與變力作功.
Tagged with 作功, 摩擦力, 斜面.
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By admin – 2009 年 03 月 24 日
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