[填空题]
(a) A grinding wheel 0.33*f8)ex qbeehmle0k9;ovm x ) 5 m in diametehrh7 o2.1vl6 aie4gj 5p b3wqzr rotates at 2500 rpm. Calculate its angular velocity hpr5eb j 3iawg.6 2qz4lovh71 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$