[填空题]
(a) A grinding wheel 0.35 m in diameter rotateg2by2n ax r+h6s :rxn ocuf6h3r;x3qo 8 at 2500 rpm. Calculate its angular velocity ic;ox nor: u3hf68xr 3qn $rad/s$ $\omega$ = $rad/sec$ (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$