問題詳情

34. A box of mass 1 kg was placed on the edge of a rotating table with radius 10 cm, as shown below. At what rotating speed, thebox begins to slide away? (The coefficient of static friction between the box and table is 0.8)


(A) 32 cm/s
(B) 53 cm/s
(C) 68 cm/s
(D) 89 cm/s
(E) 98 cm/s

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)