[填空题]
(a) A grinding wheel zixe0lpfoay; (*htb8b h8iqfgh-/5 5 l5j8qt 0.35 m in diameter rotates at 2500 rz18rby,a1d0nak2/ y ;me j8 zxzhto2hpm. Calculate its angulx11zamz2oe/y tn 2,y r;dhajzk b8h80ar 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$