[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm. Calculatg :8zn gmmf4azxvxwi31s )8z3 e its s,av+hf hww*( angular velo,w+a*hw fvh( scity 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$