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 into the air ti36:9axx wddto catch a ball and throw it uh5t .y,qjfjz9hb (o1quickly. As he throws the ball, the upper part of his body rotates. If you look quickly you will notice that toq bz hu1j59,jfyh.( 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.


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