問題詳情
15.0如圖之半圓形光滑軌道面，自地面 A 水平發射質量 m 的小物體初速 v0，軌道半徑 r，若 v0＝√3gr，當小球離地多高時恰脫離軌道？
(A)3/2r
(B) r
(C)4/3 r
(D)5/4r (Ｅ) 2r。
(A)3/2r
(B) r
(C)4/3 r
(D)5/4r (Ｅ) 2r。
參考答案
答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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