[填空题]
(a) A grinding wheel 0.35 m in diameter: 1l h(u;jfah c)v6pqd rotates at 2500 rpm. Calculate i0p72x vt0d(o* )bwlcobezd + uts angular e uo+l*x70c)dt vdbopb w2z( 0velocity 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$