本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
Suppose you are stand alagq7en8smhp0wxsr8 v/* ;7ing on thmwumhg1 u:(hlhwc .c+t;8w2b 24ymnse edge of a large freely rotating turntable. What happens if you walk toward the cente :2s8 m1h lwh4hmyu (+cnt2wm wcbg;u.r?
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
