[填空题]
Suppose a 55-kg person stand5 6p3hdkdf8ph b)-qxks at r ie00yku c:*y5vahy1j2xs2 athe edge of a 6.5-m diameter merry-go-round turntable that is mounted on frictionless beari2y a:u1ya iehxs050 vrk2jy *cngs 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. $rad/s$