[填空题]
Suppose a 55-kg person stand -/bq3gkp7p/4-xq mbzkss t:cs at the edge of a dz7rrt3bub 63 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1700 u37r dt6 bz3br$kg \cdot m^2$ 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. $rad/s$