[填空题]
(a) A grinding wheel 0.35 m in diameter rotates a: at)rwh uuf .89tmij2eevy 6*t 2500 rpm. Calculatedl,-f z4 *aycq;rfpu7 its angular velocity - *adp 7zu4flr cyq;,fin $rad/s$ $\omega$ = $rad/sec$ (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$