問題詳情

9. A mass m object moves along a circular path with radius R in a vertical plane . At the beginning it locates at the bottom with an initial speed

, Ignoring air resistance, the speed v of the object at the top of the path is:
(A)


(B)


(C)


(D)


(E) V..

參考答案

答案：99

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中

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A mass m object moves along a circular path with radius R in a vertical plane . At the beginning it locates at the bottom with an initial speed, Ignoring air resistance, the speed v of the object at the top of the path is: (A) √v02-4gR