[填空题]
Assume that a 1.00-kg ball is thrown solely8-khen kj qc6( by the action of the forearm, ns9b4v. ig7m9tixjw 9which rotates abj79tx9 msw.i9bni g4v out the elbow 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
