[填空题]
Suppose a 55-kg persux (/t e*m a e*5c2lvucxh3ak0on stands at the edge of a 6.5-m diameter m6l:l9kz6hqy+fqiv3g+ldo 1 rerry-go-round turntable that is mounted on frictionless bearings and haslvk13+y66if9h:l rzdlq o+qg 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. $rad/s$