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 iar o rn/s (b0/.mshcf.qdc3k(nto the air to catch8q:c;3f-l 1smasjwixvx (x4; z82p o,q w ldhl a ball and throw it quickly. As he throws the ball, the upper part of his body :ji; 4q;2s,(xmz- wq8 lwhcdspa fx3l8olvx1rotates. If you look quickly you 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