[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm. Calr5;e (a3ezf eqzwb,fi qy36 z2/ sctpz -f(dp3culate its angular velps dtpcf-(z3/ocity 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$