[填空题]
(a) A grinding wheel 0.35 m in diameter rotagiir dv9t-x7 5tes at 2500 rpku7rx 92sf6 ip;txu0 -tyk9yem. Calculate its angular velocity inti9ex9u 7ps-0yr;u6x2yk t fk $rad/s$ $\omega$ = $rad/sec$ (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$