gc textbook chapter 8 Rotational Motion (id: a78c718ff)

admin

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: 暂无