[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm. Cal.cl)f)iz dqa ( 0nc+dhbo0 8gi *cvnq-culate 8ulj32 4e;rumv:x psc its angular velocity i3lvpu s2m4r; :jex 8ucn $rad/s$ $\omega$ = $rad/sec$ (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$