[填空题]
Suppose a 55-kg person sta9.r(7lyl*p)ms7h)px2fu be f 4lp iem nds at the edge of a .t 6pa+53 i:v-sua+*yyfwxxxq ys1sk1uh :rq6.5-m diameter merry-go-round turnts+x:f3sap ytwiau-yr6h5 uv1q1yx *+x: qs.kable that is mounted 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. $rad/s$