[填空题]
(a) A grinding wheel dr 5j1q; ryi7qx*/,duuafxei7a2 w7 j0.3 ur8 /83n;khh0b )f4xfvhkty n5 m in diameter rotates at 2500 rpm. Calculate its angular 48)hrb 8; 3kxnyh/tu v0h fkfnvelocity 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$