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 t6ay+ rdr4,rj+swuz y)vp/l. b(w j,.(nhr*/ylzpwv eh x2c1a eing able to run fast have slender lower legs with flesh and muscle concentrated high, close to the body yrav/hjhn(*lw1(w p,z 2e.xc (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.
本题详细解析:
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Post time 2025-2-18 20:00:22