[填空题]
(a) A grinding wheel 0.35 mlnfenc52b j m+.z:co* in diamrqf th,w4jwy 4/hw edu.t/i( ;eter rotates at 2500 rpm. Calculate its angular vel/ w tqfjhe,y(h4/wr. 4twui; docity 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$