[填空题]
(a) A grinding wheel 0.35 m ietq zj 8e/bg238rw, dfn diafs4zp :b3b8b.gsdyk c44w 4rx meter rotates at 2500 rpm. Calculate its angular velocity inp8 k:44bw4s dbfgcy sz3xbr4. $rad/s$ $\omega$ = $rad/sec$ (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$