[填空题]
Suppose a 55-kg person stz lq(spfmugku(f81i)0 y s/2c 0i ou2plv(ydtd18 kv(ands at the edge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of ined v1d2kpt io8l (uvy(0rtia 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. $rad/s$