[填空题]
Assume that a 1.00-kg ball is thrown solely by the alw p2:tu g;f /krg74b 7zaur.cction of the forearm, whicdlvk2 8d8r6x6q n) cku s y1sf)w(lil:h rotates about the elbow joint under the action of the triceps muscle, Fig. 8–45. The ball is accelerated uniformly fdrinlf s:)8x2yvd6c w8l(u)l6kq1 skrom 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
