[填空题]
Suppose a 55-kg person stanc0j(y-htib , zo569elb+b+k vy aet4 ods 5d9 c lvu(ve) r)h0kkmat the edge of a 6.5-m diameter merry-go-round turntable that is mouv e(hr0m5vd9k)l)c kunted 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. $rad/s$