問題詳情
30.如圖(五)所示，AB、AC 及 AD 均為光滑之固定斜面，若物體靜止從 A 點分別沿著三個斜面同時下滑，滑至底端之瞬間速度分別為 VB、VC以及 VD，則下列何者正確？ 
(A) VD ＞ VB ＞ VC
(B) VB ＞ VC ＞ VD
(C) VC ＞ VB ＞ VD
(D) VD＝ VC ＝VB
(A) VD ＞ VB ＞ VC
(B) VB ＞ VC ＞ VD
(C) VC ＞ VB ＞ VD
(D) VD＝ VC ＝VB
參考答案
答案：D
難度：非常簡單1
統計：A(0),B(0),C(0),D(1),E(0)
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