[填空题]
(a) A grinding wheel 0.35 m in diameter rota+u ba0 1honq,ztes qz c6fvk(/ii 8at 2500 rpm. Calculate its angular velo/c6iivk fqz( 8city 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$