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18. 一小球在光滑軌道內側依順時針方向作鉛直圓周運動,小球通過最高點瞬間,速度與加速度的方向分別為何?(A) →,→ (B) →,↓ (C) ↑,→ (D) →,↑
問題詳情
18. 一小球在光滑軌道內側依順時針方向作鉛直圓周運動,小球通過最高點瞬間,速度與加速度的方向分別為何?
(A) →,→
(B) →,↓
(C) ↑,→
(D) →,↑
參考答案
答案:B
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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