本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
Suppose you are standing2a 5enkgs-4x,vtdj ,y5b9 qtw on the edge of a large freely rotfc(gqz89cgb h fj v/gqd.;68 xating turntable. What happens if you walk toward th; cf.69cx 8z(q8j hvqbfgg/dge center?
参考答案: The angular momentum of the turntable –
person system will be conserved, since no external torques are being applied as
the person walks to the center. As the
person walks to the center, the overall moment of inertia of the system gets
smaller, since the person is closer to the axis of rotation. Since the angular momentum is constant, the
angular velocity must increase. So the
turntable will begin to rotate faster as you walk to the center. This is similar to the spinning ice skater
who pulls her arms in to increase her angular speed.
本题详细解析:
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Post time 2025-2-18 20:00:22
