[填空题]
Assume that a 1.00-kg ball ozv.of62w q 7cis thrown solely by the tvk+lc2c)a8 bcf4ks .0b sv(0qx.bw e action of the forearm, which rotates about the elbow joint under the action of the triceps muscle, Fig. 8qe(k t.v w s0 lak2b0+c b)sfcbx8v4.c–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