[填空题]
(a) A grinding wheel 0.35 m in diameter rotaif 4( hv(gvh7: jyqf8mwfe 4 /-.ymiib.mcg50:4boapd d8utwbo iscd:* p2wt 1iz3 s.tes at 2500 rpm. Calculate its angular velocity intc sd51 0i 3a2w.bpbt.izpoc48 uwgo*:d :mds $rad/s$ $\omega$ = $rad/sec$ (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$