問題詳情
4.重10牛頓的物體，置於水平手掌上，手以25牛頓的力向上推物體，則物體作用於手的力若干?
(A)10
(B)15
(C)25
(D)35
(E)2.5 牛頓
(A)10
(B)15
(C)25
(D)35
(E)2.5 牛頓
參考答案
答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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