[填空题]
(a) A grinding wheel 0.35 rwn cu; 4p*2c9w hb9ixm in diamfa 8m(jb,n-5wd z1 ws 7rnw;uceter rotates at 2500 rpm. Calculate its angular vel 8uf ;wd rbsc5n(a,w-jnz7mw1ocity 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$