[填空题]
Suppose a 55-kg person stands at t,j kb5)dm gko,rd5aq( he edge of a 6.5-m diameter merry-go-roundc9-lltz ja kl6 : *ly-gkciv -(t,um0z turntable that is mounted ljtuc--09z*( llg :6ymik lkza ct-v,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. $rad/s$