[填空题]
Suppose a 55-kg person stands a,( 1jb hryuype5 09-r/rtvihxt the edge of a 6.5-m diameter merry-go-r l9);ddi t3j-axz3.h d. dnfuwound turntab).;3t z39d-.fdwluj i ahn ddxle 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. $rad/s$