本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 通用国际物理
[问答题]
A person stands on a platfo2rl2uakn-h(gh8 yzdx y 5 .z.prm, a , ql evj.edo.*.pzk(initially at rest, that can rotate freely without friction. The moment of inertia of the person plus the p jv*d(oekal q..ep. ,zlatform is $I_P$ The person holds a spinning bicycle wheel with its axis horizontal. The wheel has moment of inertia $I_W$ and angular velocity $\omega_W$ What will be the angular velocity $\omega_W$ of the platform if the person moves the axis of the wheel so that it points (a) vertically upward, (b) at a 60º angle to the vertical, (c) vertically downward? (d) What will $\omega_P$ be if the person reaches up and stops the wheel in part (a)?
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