問題詳情

4.Block A, with a mass of 10 kg, rests on a 30* incline. The coefficient of kinetic friction is 0.20. Theattached string is parallel to the incline and passes over a massless, frictionless pulley at the top.Block B, with a mass of 8.0 kg, is attached to the dangling end of the string (take √3

1.7 andg =10 m/s2). The acceleration of B is: 


(A) 0.72 m/s2, up
(B) 0.72 m/s2, down
(C) 2.6 m/s2, , up
(D) 2.6 m/s2, down
(E) 0 m/s2

參考答案

答案：B
難度：計算中-1
書單：沒有書單，新增