問題詳情
5.斜角固定的屋頂有一空水桶靜置其上，突然下起雨來。假設雨水不影響水桶與屋頂接觸斜面的靜摩擦係數，並忽略風的影響。則水桶何時會下滑?
(A)當蓄水量造成水重的下滑分力大於最大靜摩擦力
(B)當蓄水量造成水重與水桶重的正向力大於最大靜摩擦力
(C)當蓄水量造成水重與水桶重的下滑分力大於最大靜摩擦力
(D)水桶一直靜止不會滑動
(E)條件不足無法判斷
(A)當蓄水量造成水重的下滑分力大於最大靜摩擦力
(B)當蓄水量造成水重與水桶重的正向力大於最大靜摩擦力
(C)當蓄水量造成水重與水桶重的下滑分力大於最大靜摩擦力
(D)水桶一直靜止不會滑動
(E)條件不足無法判斷
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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