問題詳情
2. 如圖示，使光滑斜面的傾角從10°逐漸增加到80°那麼在斜面上的小物體(每一次出發點都在同一鉛直線上)由靜止下滑至斜面底部同一點所需要的時間，將隨θ角的增加而
(A) 減小
(B) 增加
(C) 先減小後增大
(D) 先增大後減小
(A) 減小
(B) 增加
(C) 先減小後增大
(D) 先增大後減小
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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