[填空题]
(a) A grinding wheel 0.35 m in diameter rot/be34 cerk,ezv,1 / uj lsxbws7uq5-i ates at 2500m*fj d 92,u2,veivgra rpm. Calculate its angular velo2*2jav,r fdugv,mi 9 ecity 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$