[填空题]
(a) A grinding wheel 0.35 m inp c,l25kob /bp diameter rotates at 2500 rpm. Calculate ie4e; /rw+;6/fk hfx z s1svy,xrgkp t-ts angular velocfe,/w r-4+ x1; / trskefpys;g6xvzkh ity 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$