[填空题]
(a) A grinding wheel 0.35 m 4 om9c7rzf hl tb8d56oin diameter rotates at 2500 rpm. Calcula s(a- i qqauk3s9r,k5r9ew931 cqpf odte its angular v -a99q o3cak3q u,r1r5 peswfid(9 qkselocity 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$