[填空题]
Assume that a 1.00-kg ball is thrown ii do -v5bd*4ls(pty8n 614safzrxs kr8e( pr+olely by the action of the forearm, which rotates about the elbow join8a+yk 61rzt (p er4 fps8(rsxnt under the action of the triceps muscle, Fig. 8–45. The ball is accelerated uniformly from rest to 10 $m/s$ in 0.350 s, at which point it is released. Calculate
(a) the angular acceleration of the arm, $rad/s^2$
(b) the force required of the triceps muscle. Assume that the forearm has a mass of 3.70 kg and rotates like a uniform rod about an axis at its end. N
