[填空题]
Suppose a 55-kg person stands at the edge of a 6.5-m diameter merry-guj+loe v*rf d5,(o4mc hvn b8;oqmm(7q 8u0 neu-round turntable that is mounted n u qq0emu(7m8on 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. $rad/s$