[填空题]
A softball player swings a bat, acw) e i;r/,,zi8lx97a urfoojm celerating it from r6fs )gwt5cj y/est 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. $m \cdot N$