[填空题]
(a) A grinding wheel 0.35 m in diametrh1: 1jhidd h d3m9sw:er rotatelkv4 /v1-vw07ga zs sks at 2500 rpm. Calculate its angulv 0ag 1kwlk/svz4-vs7 ar 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$