[填空题]
Suppose a 55-kg person stands at the edkmawd7b )k; z /tf5w 9f;dcv,fge of a 6e57vhxb;wgzwi l t- 5/d.qo;s .5-m diameter merry-go-round tur.wh; q-silz ;5 to/v75debwgx ntable 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. $rad/s$