[填空题]
Suppose a 55-kg person stands at the z2wu9i) *ybmee7k, dc;gpla 44 -) waqnshyq8tdge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and haaqp4;s4 l)h, ywn gc7qd8 k-tas 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. $rad/s$