[填空题]
A baseball pitcher throws a baseball with a y;9h5yjdk vohrl9: k*speed of 44 p,pu2h jwdme0 47hxg4q;ac0 um/s In throwing the baseball, the pitcher accelerates the ball through a displacement of about 3.5 m, from behind the body to the point where it is released (Fig. 2–41). Estimate the average acceleratio,du;p20a 4u0j 7eh qchg 4wmxpn of the ball during the throwing motion. $m/s^2$
