[问答题]
A wheel of mass M has rad q0- 0uan6h9(lwwz l y +,rmgu6dg3ykjius R. It siwfq+u jd . kim103q5iep0)q is standing vertically on the floor, and we want to exert a horizontal force F at its axle so that it will climb a step age wq)qs.p1midu 30ifq5i +0 jkainst which it rests (Fig. 8–55). The step has height h, where h
Post time 2025-2-18 20:00:22
