[填空题]
Assume that a 1.00-kg bal h oo/aweb.))jl is thrown solelywv j74t *:/ye6n.ml/ dicqwwz by the action of the forearm, which rotates about the elbow joint under theyqzw .v4/7 jm6nweld*:iwc /t 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
