[填空题]
Suppose a 55-kg perso j9y2m o, 8cnyapg)r/.*fkiwl n stan3n q mf4*yjct-b9ry w)ds at the edge of a 6.5-m diameter merry-go-round turntable that is mounted on frbn) - *jm9wy4 frq3ctyictionless 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. $rad/s$
