[填空题]
(a) A grinding wheel 0.35 m in diamu +ru s)p.qhbte;c0t)eter rs ;xra /vv:wf+q72 xyqch bk:7otates at 2500 rpm. Calculate its angular v/xqw7;axkv ycqsh 7:v: f2+brelocity 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$