問題詳情
4. 承上題,當 M 滑入 BC 間時,而仍未靜止時,繩張力=?
(A) 19.2 N
(B)20 N
(C) 20.8 N
(D) 22.4 N
(E) 27.2 N。
(A) 19.2 N
(B)20 N
(C) 20.8 N
(D) 22.4 N
(E) 27.2 N。
參考答案
答案:C
難度:困難0.333333
統計:A(0),B(0),C(1),D(2),E(0)
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