問題詳情
36. A frictionless curve of radius 500 m is banked with a banking angle θ = 30°. A ball of mass m = 10 kg and radius r = 50 cm is moving on it. What angular velocity is needed for the ball moving on the curve without need of frictional force?
(Gravitational acceleration g = 10 m/s2 ) (tan 30° = 0.577)
(A) 53.7 rad/s
(B) 107.4 rad/s
(C) 214.8 rad/s
(D) 332.2 rad/s
(E) 429.6 rad/s
參考答案
答案：B
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中