[填空题]
(a) A grinding wheel 0.35 m in diameter rotates a*8e*f8g.gffil t tz4 at 2500 rpm. Calculam,56 a n.ix*uv zoto1j+1rzk,5l as cqte its angular velocity in,jva qz*cz +s1nt. xm5iu56 o ,l1kroa $rad/s$ $\omega$ = $rad/sec$ (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$