[填空题]
(a) A grinding wheel 0.35 m in diameterr6 gkm h-7j2jk rotate oge(epsu:rc3fw if bty 3(; /i.wcf3,s at 2500 rpm. Calculate its angular velocbitriy( :u.g ;/3wwefe3opfcc(3 f,sity 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$