[填空题]
Assume that a 1.00-kg + mwwbahi1f10,vmwxbh44 w i 6ball i32 wal em9/xhyf9m 9ksa2do:is thrown solely 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 unifom 3fd2 a 9aohiw/ly:m2e9xs9k rmly 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
