[填空题]
(a) A grinding wheel 0.35 m in diameter rotates4n7vi91jtpbb 0 m:yd i at 2500 rpsm ;c0sdc1 .pwm. Calculate its angul01;w dp.cmscs 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$