[填空题]
Suppose a 55-kg person stands at thefxk ,d c20/gvt edge of a 6.5-m diameter merry-go-round turvg0 /2fxktc,d gxf ulzs3x92htqz)uh2 z :17u ntable that is mounted on frictionless bearings and has a moment of inertiahx92 3u) :2ltsgzqzh7x 1zuf u 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. $rad/s$