本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 IB物理学
[问答题]
Suppose you are standing on thejb gkrz/ej d:0(t75u o.n f*qm edge of a lartq 13ez7+,2b/l ayx okazw3su ge freely rotating turntable. What happens io731azl st +/a q3u,wk2zybex f you walk toward the 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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