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*;ats:g0 h. a1 hectbj slender lower le w dmb)9:1/ckv)kgrkq gs with flesh and muscle concentrated high, close to the body (Fig. 8–34). On the basis of rotational dynamics, explain why this distribution of mass is amw:gd1bk)vk)k/c r9 q dvantageous.
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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