[填空题]
(a) A grinding wheel 0.35 m in diameterdy*a)w/u t4 xn rotates at 2500 rpm. Ca scux; ;qck:2k5 3 tj,es8zbrnlculate its angular velocity in kk2tebns,qc rcx3 :;zj85 su; $rad/s$ $\omega$ = $rad/sec$ (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$