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]
Suppose you are standing on thvub u3 .0/s)xlgrytjg s;0*e se edge of a large freely rotating turntabsq7e,m.i 7 ,bodildpn 3j,v:ymen+o 4le. What happens if you walk , en,7iem sb3.jddv4o,:7m y+qpoilntoward 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:
暂无
| 
