本题目来源于试卷: gc textbook chapter 8 Rotational Motion,类别为 unclassified
[问答题]
Mammals that depend on being able to run fast r;crc,4e.no m have slender lower legs witczg; a95y/ )rygz+0rnq27 t6wl lg zfrh flesh and muscle concentrated high, close to the body (Fig. 8–34). On the basis of rotational dynamics, explain why twzz2f) arr g9+5ll;ry 06gyqn/ cz7g 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.
本题详细解析:
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