gc textbook chapter 8 Rotational Motion (id: db23c4ed4)

[填空题]
The forearm in Fig. 8–45 accelerates a 3.6-v- gzq,v 9l oz*pm85xclj splja t 4q2+gtfgq g:.(7-ikg ball at 7 $m/s^2$ by means of the triceps muscle, as shown. Calculate
(a) the torque needed,    $m \cdot N$
(b) the force that must be exerted by the triceps muscle. Ignore the mass of the arm.    N

参考答案:
空格1: 7.812±2%  空格2: 310±2% 


本题详细解析: