[问答题]
A wheel of mass M has rad0l.fuu8 0jwe gius Rna yvsvdf-9-oiq1yx9p2:q+bgr2a bmja 0) 2z. It is standing vertically on the floor, and we want to exert a horizontal force F at its axle 9gqzvf dy21bxi2mvq - a20a :arp+j s9n)boy-so that it will climb a step against which it rests (Fig. 8–55). The step has height h, where h
Post time 2025-2-18 20:00:22
