[填空题]
Assume that a 1.00-kg ball is t*lo,of 5m a* 77*oiwcdz -ygpahrown 0a9v)j z 2vzrasolely by the action of the forearm, which rotates about the elbow joint under the action of the triceps maz 0vra)2jzv9uscle, 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
