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 cd,zyj 9b hu,y2qj;bu;atch a ball and throw it quickly. As he tvxio dk-)g/d rg9 +.yohrows the ball, the upiy/dx9g)rv+-d g. ok oper part of his body rotates. 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
| 
Post time 2025-2-18 20:00:22