[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpmyu( vx 5722 osxha0kvu. Calq 81tv( zxz)boculate its angular velocity in qz)bx18t(v oz $rad/s$ $\omega$ = $rad/sec$ (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$