gc textbook chapter 8 Rotational Motion (id: a29dc99a7)

admin

本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified

[填空题]
A small 650-gram ball on the end of a thin, light rod is rotated, /f vsj ynwc* piiw9w5me0*b) in a horizonta+4:gl.in jfh+,ff gwfp )7 gj4hbd .fwl cir w 4hfn7iff.bj,gj+fph):d lgf4 w.g +cle of radius 1.2 m. Calculate
(a) the moment of inertia of the ball about the center of the circle,    $kg \cdot m^2$
(b) the torque needed to keep the ball rotating at constant angular velocity if air resistance exerts a force of 0.020 N on the ball. Ignore the rod’s moment of inertia and air resistance.    $m \cdot N$

参考答案:
空格1: 0.94±2%  空格2: 0.024±2% 


本题详细解析: