Question

A girl with a mass of 25kg rides on a merry go round. The merry go round is a disc with a radius equal to 2.5m and a mass of 100kg. If the girl is riding on the edge, 2.5m from center, the angular speed of the merry go round is 1.25 radians per second. What will the angular speed be if she moves to the center of the merry go round, distance from the center zero.