[填空题]
A 1.4-kg grindstone ine z3lrtd;.57h9 xs iol the shape of7z4dme 9wqvi,md f/2t a uniform cylinder of radius 0.20 m acquires a rotational rate of from rest over a 6.0-s interval at constant angular acceleration. Calculate the torque delivered /m7dzfqe4 vd t29mw,i by the motor. $m \cdot N$