本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified
[问答题]
A shortstop may leap into the air to catch a ball aa-*0v wnzmy,k-ppm g; )b*tijnd throw it quickly( .,qy1kl1hvm;wu-l3mh vl um. As he throws the ball, the upper part of his body rotates. If you look quickly yk -mv1lumw(q1lh m;v .3ulhy, ou will notice that his hips and legs rotate in the opposite direction (Fig. 8–36). Explain.
参考答案:
The
shortstop, while in mid-air, cannot exert a torque on himself, and so his
angular momentum will be conserved while in the air. If the upper half of his body rotates in a
certain direction during the throwing motion, then to conserve angular
momentum, the lower half of his body will rotate in the opposite direction.
本题详细解析:
暂无
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Post time 2025-2-18 20:00:22