gc textbook chapter 8 Rotational Motion (id: ec2d220d5)

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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]
Can the diver of Fig. z :oh)b,9 lddd tjn )x19/zxplu g/hr( d s:k/o+yeparf)3jg7 8–29 do a somersault without having any initial rotation when she leaves the boar+ /(us7o)epra3 / gkhfj:dgy rd?

参考答案:

In order to do a somersault, the diver needs some initial angular momentum when she leaves the diving board, because angular momentum will be conserved during the free-fall motion of the dive.  She cannot exert a torque on herself in isolation, and so if there is no angular momentum initially, there will be no rotation during the rest of the dive.

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