[填空题]
(a) A grinding wheel 0.35 m5;h tqinzt1c ( sh-:g6:rz gnd in diameter rotates at 5h56bw,yynm -f o155y zbukrf 2500 rpm. Calculate its angular veloci-ob n5mzfu w 5fby1y,r6h5ky5ty 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$