[填空题]
Assume that a 1.00-kg ball is thrown solely by ther3rmjr/ey*t +9id :z9h+ q hsp action of the forearm, wcmx 37 :znpabwwd()s5i; id,bs- vmp;hich rotates about the elbow joint under the action of the triceps muscle, Fig. 8–45. The :3) zsnm5p;,w(vs- wimpi7cdb dbxa ; 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
