[填空题]
(a) A grinding wheel 0.35 m in diame++ j4l*rsc mmtter ).5q 3ls, fa.x ionwhzrotates at 2500 rpm. Calculate its angular velocity.n )ih, ws3 a5fl.zqxo 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$