[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpms:4q/7utaz tc . Calculate its an mgd33jwul.h9 j3 0nfagular.jw d9033 f hmlag3nuj velocity 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$