本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 IB物理学
[问答题]
Mammals that depend on being able to run fast have sl9cf kr65;w bglenderfup tjw 6;7wzynq x -n.*h/w; ;1myllv lower legs with flesh and muscle concentrated high, close to the body (Fig. 8–34). On the basis of rotational dynamics, explain why this disx z;*l-nnfw / 61m w.pj 7;;hyuqvtylwtribution 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.
本题详细解析:
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