15. A thin-walled hollow tube rolls without sliding along the floor. The ratio of its translational
問題詳情
15. A thin-walled hollow tube rolls without sliding along the floor. The ratio of its translational kinetic energy to its rotationalkinetic energy (about an axis through its center of mass) is: (A) 1 (B) 2 (C) 3 (D) 1/2 (E) 1/3