[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm. Cala (thf e (kv,c9af-1ulculate wm.. .r dgd8dxits angular velocity ird.dd gw8x.m. n $rad/s$ $\omega$ = $rad/sec$ (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$