[填空题]
(a) A grinding wheel 0.35q 7+si gz-sofsdtjit :l) s9., bnwsy*;b* xucr(sg4 : m in diameter rotates at 2500 rpm. Calculate its angular ves;y*w4snx:b ( cbg*r ulocity 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$