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

[问答题]
A wheel of mass M has radiqo4 o; vm-+ewa.m4fblus R. It is standing verte4b 1y::xn7rb 0 ossrzically on the floor, and we want to exert a horizontal forcex4z s0r:b1e:sn obr y7 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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