[填空题]
(a) A grinding wheel 0.35; /:jqupm)pb u ycj7hi*a 4 ik+ wzgrl.*xj(eu. :uyw3m in diameter rotates at 2500 rpm. Calculate its angular velor k4.iweyg( +uhic lz *uwj3:xj7y* .acity 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$