[填空题]
Assume that a 1.00-kg ball is thrown solely by the action of th- mw1tx n5n2qhe forearm, * i;/oo bew+wzwhich rotates about the elbow joint under the action of the triceps muscle, Fig. 8–45. Th*zo;ewb+ o/i we 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
