[填空题]
(a) A grinding wheel 09tx mz7t9+h drp.+od4ut*aw g.35 m in diameter n9p-cgb+:k9.knttkvc * pe )w rotates at 2500 rpm. Calculate its angular velocity iccpp*nw)9k ktgn-.kvb + t :e9n $rad/s$ $\omega$ = $rad/sec$ (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$