[填空题]
(a) A grinding wheel 0.35 m in diae)x kgpw8)8 h/pqgo l9meter rotatesu xbj/8sca4pngt8qym a0,2 v- at 2500 rpm. Calculate its angular velocity in namv - t08p8gy4b,aq2c/sj ux $rad/s$ $\omega$ = $rad/sec$ (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$