[填空题]
(a) A grinding wheel 0.35 ; gz/-15mzhhk9u+ fca f;mylj:n0zfqm in diamkzrb hlz4 akrt uw x5 ol*b2d6+co(/69eter rotates at 2500 rpm. Calculate its angular velocity in wcr 9z+*akb6(2 5xudo4lkh6 obzltr/$rad/s$ $\omega$ = $rad/sec$ (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$