[填空题]
(a) A grinding wheel 0.35 m in diameter rotate/um: wq wm0y4cs at 2500 rpm. rb ;glwly9v/- Calculate its angulalgl 9bvwry- /;r velocity 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$