[填空题]
Suppose a 55-kg person stands at the edge of a 6.5-m diav6l:k1bjt1vb/lb /h s meter merry-go-round to36i3gv8y xx9 tpsninxrb dx94n*k)0urntable that is mounted on frictionless bearings and has a moment of s9kx)rx*n6 nvoxx8ni3 y4itd 3p09 b ginertia 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. $rad/s$