[填空题]
Assume that a 1.00-kg ball is thrown solely ( m1xjeru-2 uwby thg57y i,fm4 mzje action of the forearm, which rotates about the elbow joint unm gjzm,57i 4fyder 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
