[填空题]
Suppose a 55-kg person6cvxat flbdei8x4 ;f6(5wkf9 stwz+e tzmu7b +k9 ;pn/tands at the edge of a 6.5-m diameter merry-go-round turntable that is mounte+nt9mt;/bwup z 7 ekz+d on frictionless bearings and has a moment of inertia of 1700 $kg \cdot m^2$ The turntable is at rest initially, but when the person begins running at a speed of 3.8 $m/s$ (with respect to the turntable) around its edge, the turntable begins to rotate in the opposite direction. Calculate the angular velocity of the turntable. $rad/s$