[填空题]
(a) A grinding wheel 0.35 m in diameu( y; 3xcigwldm;np(,k cj 8a.ter rot+z y ( ):oml .l7;jcnmbchlhp(ates at 2500 rpm. Calculate its angular )hhl:(c7 bmm+( j; ylzpocn .lvelocity 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$