gc textbook chapter 8 Rotational Motion (id: db23c4ed4)

[填空题]
The forearm in Fig. 8–45 accelerates a 3.6-kg ;t5.nemzma8igvu/o*2l )l:u vum dk1 8a j-m;/g ksve h6yz:rball 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: