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 lower l-ky0ldw+ :dzvegs with flefgmx3 ht :/ xl t; wz9;m01c6pkundr9osh and muscle concentrated high, close to the body (Fig. 8–34). On tt1u ;t;wnr6m9dlx/m xpkg 9h 3f 0:zcohe 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