[填空题]
Suppose a 55-kg persone3jt/jzvpr*f + s)me -hrsh/ 3 stands7m3yj+ d-+su*dbzb+,ai- mljik(i m c at the edge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment omb3 j7, iu++km ii -dj+azmy -b*d(cslf 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. $rad/s$