[填空题]
(a) A grinding wheel) j xs-(d;qxcqfwgyogeysi h8h ;v 57kt6c;5. 0.35 m in diameter rotates at 2500 rpm. Calculate its angular velocit;h5kc 6she;w vy8g ot7yg.if5y 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$