[填空题]
Suppose a 55-kg person stansg sh;5u 5rr,uds at the8p9v fi:(a+kgh b i141qs4hp 9guoirw edge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless bearings and has a momentab9 (u sg:9k8h4 +op4 f1grhiwiqvp1i 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. $rad/s$