gc textbook chapter 8 Rotational Motion (id: a78c718ff)

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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]
Mammals that depend ruz, -3 vpl*z7 +evb 6qkczr*f)w, c8ku,gx wvon being able to run fast have slender lower legs with flesh and musclecg,u,kwxw) v8 concentrated high, close to the body (Fig. 8–34). On the basis of rotational dynamics, explain why this distribution 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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