[填空题]
(a) A grinding wheel 0.35 m in diamet5/p qiel4ml -gjy54; ja r8wdser rotates at 25n6djxt6xsca;8j 6 t/i00 rpm. Calculate its angular vej6 8j66xxdcn/ it;tas locity 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$