[填空题]
(a) A grinding wheel 8dns 3w s82rj hsb*zlcwtqz,m. ou8 ,)0.35 m in d 0pni pdb8w cepz9-x6/9egoj) iameter rotates at 2500 rpm. Calculate its angular ve)x bp oej9zgd-8np0c6i /9wp elocity 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$