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範例:非固定力作功與微(積)分觀念

某人推一質量 m 之物體,緩速繞半徑為R的圓周半圈,設物體與地面之動摩擦係數為 m , 重力加速度為 g ,則此人作功為何?(A)0 (B)- mmgR (C)-2mmgR (D)πmmgR (E)2πmmgR。[93前中]


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Posted in 功與變力作功.

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By admin – 2009 年 03 月 25 日

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