[填空题]
Assume that a 1.00-kg ball is thrown solely by thejybp i8jq lqd/)-wz0 h7 jd68m action of the fomi3bl wc3(jz 9rearm, which rotates about the elb9bi3w3(cjzm low joint 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
Post time 2025-2-18 20:00:22
