[填空题]
Suppose a 55-kg person stands at the ed*)xl2(bwg7 ps do ovy4ge of a 6.5-m diameter merrydms5kyfq .dd +bzw:ud:) ;d+ j-go-round turntable that i z qbddd+kj).fsyd5w: :u m;+ds 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. $rad/s$