[填空题]
(a) A grinding wheel 0.mg*i a*.z8uw+dqp 1 nw35 m in ug1+z* .haooym-tjsy6wq3uq+mo- z6diameter rotates at 2500 rpm. Calculate its angular velozt1oy6m+ o yqw+ou 3saz. hq6jgu *--mcity 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$