[填空题]
(a) A grinding wheel 0.35 m in diameter r1nfc9ww d3+fpwtl+vu -e1mm *ot cb;zo6 qw)cs)sm7k0 aates at 2500 rpm. Calculate its angular velo; )ms)7ocwka6s bq0 zccity 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$