[填空题]
Suppose a 55-kg person stands at the edge of a 6.xjhtm5.vg+esz -b0 5 r5-m diamr gnqwc*c *ad-a-q u5y; kyc;fx7g) -leter merry-go-round turntable that is mounted on frictionless beariyx--7c*q 5nrdqaw kgc;l y) f-* aucg;ngs 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. $rad/s$