[填空题]
(a) A grinding wheel -p( . soby7eqz0.35 m in diaiq +kgmo-+h 6xmeter rotates at 2500 rpm. Calculate its angular igm+ -6hkqo+ xvelocity 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$