[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2500 rpm v2fktjv;.nr(5 v*yyv . Calc0pl5wrj2xwhor ) z. rh4yk(a/r1xyo( ulate its angular velocity ).x20r ywxl45j /p1r(h yrzh rko(awoin $rad/s$ $\omega$ = $rad/sec$ (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$