[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm. Calcufsfh 8 b*1 m3(zccvt-plat ki bw-,t++zgue its angular velocity k ug,bt -zw+i+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$