[填空题]
(a) A grinding wheel 0.35 m in m ottyy ;5k6q;diameter rotates at 2500 rpsn2ms ati )m+v6wst+3m. Calculate its angular ve iasn2vt 3)6m msw+s+tlocity 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$