[填空题]
Suppose a 55-kg person stands at the edcs;( z3b 12zgu 0knpbsge of a 6.5-m diameter merry-go-ro:d zc3;g0+wdaj p(jnotm;: jgund turn (dmo:pd 3gzw:g;;+n jc0tjja table 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. $rad/s$