[填空题]
Suppose a 55-kg person stands azh9 d69 *haowlt the edge of a 6.5-m diameter merry-go-rrr9l08vmtj jkkjgzr81 55cp :ound turntable that is mounted on frictionless bearings and has a moment of inertia of 1rv8gr5k810 j l:r ctmjj5zk9p 700 $kg \cdot m^2$ 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. $rad/s$