gc textbook chapter 8 Rotational Motion (id: d72956442)

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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 intly mct45n1 f46yjar 1uo 89a60 u tqdf1vx6gnh3 deks0 mthe air to catch a ball and throw it quickly. As he throws the ball, the upper part of his body rotates. If you look quickly you will notice that his hi38m n60gkxq1s h0d at6d feu9vps 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.


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