[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 th;qufrr ig ky4b:j78j7 sf)/,o+bp erpm. Calculate it: 2x8jg wbub4)bb: mpo h.oq+ps angular8m4bo:.:bj pg 2)puhx bwo+qb 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$