[填空题]
(a) A grinding wheel 0p ye-ph/ qn6rs)78f zly,eu )c.35 m in diamet4 zcs 1(s6 ew 9r)ceof(iznl(qer rotates at 2500 rpm. Calculate its angular velocity r9qz1c (f ((c)i4nose ze6swl 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$