[填空题]
Suppose a 55-kg person stands at the edge of a 6.5-m dik:lkm1zbaq q t+k0w 2tyc9 b14ameter merry-go-2hf* 6h; g/bhxyu7qauround turntable that is mounted on frictionless bearings and has a hh*y2 7f/hu;qa6 uxb gmoment 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. $rad/s$