gc textbook chapter 8 Rotational Motion (id: 5edd6fe9f)

[问答题]
A wheel of mass M haplhi,/wzn+e ,2p4pes s radwk;b; q3so pb1ius R. It is standing vertically on the floor, and we want to exert a horizontal forceb wqbo s1;3k;p F at its axle so that it will climb a step against which it rests (Fig. 8–55). The step has height h, where h

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