[填空题]
A 4.2-m-diameter merry ubjj,-/ uv7to7 jig ude0s19k7o7 h ti8j+tannwt4)o-go-round is rotating freely with an angular velocity of 0.jt84g ot)1akjwonidehi n +97s 7 u7t08 $rad/s$ Its total moment of inertia is 1760 $kg \cdot m^2$ Four people standing on the ground, each of mass 65 kg, suddenly step onto the edge of the merry-go-round. What is the angular velocity of the merry-go-round now? $rad/s$ What if the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round)? $rad/s$
