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gc textbook chapter 8 Rotational Motion (id: 50f666cf4)

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admin 发表于 2024-12-17 22:56:37 | 显示全部楼层 |阅读模式
本题目来源于试卷: gc textbook chapter 8 Rotational Motion,类别为 通用国际物理

[问答题]
Mammals that depend on being able to run fast haxz ydi;vp9;2dz 1oyy f*hw)+ rveg or 5yvs4)0ro slender lower legs with flesh and muscle concentrated high, close to the body (Fig. 8–34). On the basis of rotational dynamics, explain why this distribution0roogs5y 4) vr of mass is advantageous.




参考答案:

The legs have a lower moment of inertia when the leg mass is concentrated next to the body.  That means the legs will require less torque to have a given angular acceleration, or, alternatively, a higher angular acceleration can be developed.  Thus the animal can run fast.




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