[填空题]
(a) A grinding wheel 0.35 m in diameter rotates dfs,v+jl/wb hfp u6xik21x :)at 2500 rpm. 363v j*2rqmxd-xx+y wtw srb5 Calculate its angular velocitym j353btxr x2qdr-6*wwxv+ys 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$