A child (40 kilogram) stands on the edge of a stationary merry-go-round (uniform disk of radius 1.2 meter and mass 50 kilogram). The child jumps off at 1 m/s with respect to the ground in the direction tangential to the edge. Obtain the angular speed of merry- go-round after jump. Suppose the friction on the axle of the merry-go-round is very small.