[填空题]
Suppose a 55-kg person stands at the* ./ 3zit)vxnrhf9aj)8cbxin edge of a 6.*e )ydnz 2h71x,:2q zyb:xntdlx)n c(cu ,avo5-m diameter merry-go-round turntabley(e)d:onc axctzx7: 1nq ,zvy,l u2 2hdn) *bx that is mounted 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. $rad/s$