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 have slender 6:/wh-szr 9 fm2cdy v ovg-le4lowhme:vh kc1m*m+4,w /y aa563zzyq-ezh bj8 uker legs with flesh and muscle concentrated high, close to the586y ev/mh1 embzjk-3auh 4wz +:zch*,a qkym body (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: 暂无