[填空题]
(a) A grinding wheel;gt8jbk3(-lvpb w 3wo 0.35 m in diameter rotates at 2500 rpm. gyevro aneelkn1-w28 *4-nr . Calculate its angularn2wee-k -vr*e1alg8 . ry4non 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$