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

[问答题]
A wheel of mass M has radiuy/ p8n vrdz32ys R. It is standing vertically on the floor, and kjt97 uzrw7/p we want to exert a horizontal force F at its axle so that it will climb a step against which it ret 7pjkur9w7 /zsts (Fig. 8–55). The step has height h, where h

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