[填空题]
Suppose a 55-kg person mv/ 7t;t-lbi wstands at the edge of a 6.5n /2ytfohye ju6x /u,1xnj**d-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a momen*f/e,16 2xtu j uox*ndyhjy /nt 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. $rad/s$