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

[问答题]
A wheel of mass M has radius R. It is standingol+e h3g7- s qr 0fijml)s+pp6 verticm :5exc9lco x;o:v fq(ally on the 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 hfvl9 (ox:5 moq c:ec;xas height h, where h

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