[填空题]
(a) A grinding wheel 0.35 m in diameter rot8ni; y0gc qqm4b f4ds4ates at 2500 rpm. Calculate it(2g7c5f cupt wkt)f/us angulku ft/(c2futp75) cgwar 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$