問題詳情
41.施力為2.5kgw，此時接觸面的摩擦力應該是多少？
(A) 2.5
(B) 3.0
(C) 3.5
(D) 4.0 kgw。
(A) 2.5
(B) 3.0
(C) 3.5
(D) 4.0 kgw。
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
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