[填空题]
A softball player swings a bat, :,w yhtb.d324 g bdylgkoe 1r9acceleratinhulik; (v/c,7txm( vs n,8yhv b7bh; sg it from rest to 3 $rev/s$ in a time of 0.20 s. Approximate the bat as a 2.2-kg uniform rod of length 0.95 m, and compute the torque the player applies to one end of it. $m \cdot N$