問題詳情
16.如附圖所示，將 4 kg 的物體放在水平的地板上，施以 0.5 kgw 的水平推力，若此物體靜止不動，則物體所受的摩擦力為：
(A)0.5 kgw
(B)3.5 kgw
(C)4 kgw
(D)4.5 kgw
參考答案
無參考答案
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