[填空题]
Suppose a 55-kg person stands at the edge of a 6.5-m d u5k*u-x9*xtcrh ohk :iameter merry-govl jrk*7d.wa1v(d; ers:3 hpk4:ew cl -round turntable that is mounted on frictionlral3:7ejk(l;h* d: e4vc.v rkdpsww1ess 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. $rad/s$