[填空题]
(a) A grinding wheel 0.35 m in diameter rotates at 2uv -. mg1g0r p d1zj6h4jwu.dw500 rpm. Cph)xne( 0ykn 7alculate its angular velocity x7pyn0() ehnkin $rad/s$ $\omega$ = $rad/sec$ (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$