問題詳情

9. A wheel of radius R is mounted on a frictionless, horizontal axle that is perpendicular to the wheeland passes through the center of mass of the wheel. A light cord wrapped around the wheel supportsa object of mass m. If released from rest with the string taut, the object is observed to fall with adownward acceleration of 4.0 m/s2. If the moment of inertia (of the wheel) about the given axle iswritten as BmR2, then B=? Take g= 10 m/s.
(A)1.0
(B)1.5
(C)2.0
(D)3.0
(E) 3.5

參考答案

答案：B
難度：計算中-1
書單：沒有書單，新增