一個滑輪組有定、動滑輪各 3 個，今欲將 300kg 重物提升 6 公尺，則需加力(A)10kg (B)50kg (C)100kg (D)150kg。

問題詳情

5.一個滑輪組有定、動滑輪各 3 個，今欲將 300kg 重物提升 6 公尺，則需加力
(A)10kg
(B)50kg
(C)100kg
(D)150kg。

參考答案

無參考答案

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