[填空题]
(a) A grinding wheel u5 2lr3y2vl ce2b* gin0.35 m in dia lqc +lyhki7rh/.dow8;jiilu :5z-l+ct8)j gmeter rotates at 2500 rpm. Calculate its angular vel:zl/)j.qhd+ c ic5tiou8k;i87 -llyhj+rwl g 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$