[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 0vx/lvh( ft ol*e;2( fpi/h dv2x ib0 tnyr6ib*859c ak500 rpm. Calculate its angularakr5xc9b t68*b i0y in velocity in $rad/s$ $\omega$ = $rad/sec$ (b) What are the linear speed and acceleration of a point on the edge of the grinding wheel? v = $m/s$ $a_R$ = $ m/s^2$