[填空题]
Assume that a 1.00-kg ball is thrown solel-ox6* n4 yzsjhmd6.u dy by the acti(x si;9oyrj+(2dj59ksoficxd diu ;x0c +w n2on of the forearm, which rotates about the elbow joint under the action of the triceps muscle, Fig. 8–45. The ball is accelejcn( xi+;jsxyw(59 209; oodi ux s2k+ifrdcdrated 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
