[填空题]
Suppose a 55-kg perso m c23f(nj55acrwfvu0 n stanpab-o6 vw-2+z cvr45o9ku euids at the edge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a mro54- 6uz9ko -wabi2pe cu+vv oment 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. $rad/s$