[填空题]
(a) What is the angular mom; nuit1pjj,kg4 tt:sy(o5 h-hentum of a 2.8-kg uniform y ij 6u6ny5hxb, qkamf572. lscylindrical grinding wheel of radius 18 cm when rotating at 150.ifmyy52n5lxqk s ,u a6 jbh760 rpm? $kg \cdot m^2$ (b) How much torque is required to stop it in 6.0 s? $m \cdot N$