[填空题]
(a) A grinding wheel 0.35 m in d8l:yef a(0 k5lri3lk n7pg6 keiameter rotatesd f7)-4c(zhkonwuhn3d vrqi.z x* i5. at 2500 rpm. Calculate its angular velo3qcvzn5 i..z hixdod4ru-*( hn)k7 wfcity 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$