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範例:靜力平衡與三力平衡

如圖所示當F=10牛頓時,恰可使OA線偏離鉛直線30o,並維持平衡;若欲使OA線偏離鉛直線53o,且維持平衡,則F施力為多少牛頓?[88前中]


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By admin – 2010 年 09 月 14 日

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