[填空题]
Assume that a 1.00-kg ball +(gz tim9zw9:ljk4/y* p uukx wby2 /nis thrown sole9ivb( fsgv7 i)d ub+)ksm0 zn)ly by the action of the forearm, which rotates about the elbow joint under the action of the triceps muscle, Fig. 8–45. The ball is accelerated uniformly from rest))sgv)uii kd+0(v 9mb7 nsz fb 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
