[填空题]
(a) A grinding wheel 0.35 m in diamrymo:3 79+zspf :x admvw m7hea:fiw,pj 02u3ete (i . nr:rpklpg)27hjmr rotates at 2500 rpm. Calculate its angular veloirjhm2) n (:pgr p7kl.city 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$