[填空题]
(a) A grinding wheel 0.35 m in diameter tc14bg ,r6ianxb ; au0ropid-((cdh75fjnn ) i htates at 2500 rpm. Calculate its angulhnh)7 nfd-picid ( (5jar velocity 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$