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

[问答题]
A wheel of mass M has radius R. It is standing vertically onvf 01lz(rba xw6:h84py;x*.s qspp mf 2)l6qmgey9g e/a8bkxthe floor, and we want to exert a horizontal force F at its axle so that it will climb a step against which it rests (Fig. 8–55). The step has height h, wher6m2 9ygexe )ql8gk/ bae h

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