[填空题]
Suppose a 55-kg perso7po (d2axmiaegm.h xylh y.4-p38 6w tn stands at wm*x )pfxw z*y7i j9e;the edge of a 6.5-m diameter merry-go-round turnt *wi*;e9z w7 )myxpjxfable 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. $rad/s$