[填空题]
A 1.4-kg grindstone in 2 o9l6.bw,arku dcf d,the shape ok2 -.+vslmb/t cvfr:ef a uniform cylinder of radius 0.20 m acquires a rotational rate of from rest over a 6.0+2kctm-.v s:fv/ lebr-s interval at constant angular acceleration. Calculate the torque delivered by the motor. $m \cdot N$