問題詳情
2. A solid sphere, spherical shell, solid cylinder and a cylindrical shell all have the same mass m andradius R. If they are allreleased from rest at the same elevation and roll without slipping, which reaches the bottom of aninclined plane first?
(A) solid sphere
(B) spherical shell
(C) solid cylinder
(D) cylindrical shell
(E) all take the same time
參考答案