A 22.0 kg child is riding a playground merry-go-round that is rotating at 40.0 rpm. What centripetal force must she exert to stay on if she is 1.25 m from its center? What centripetal force does she need to stay on an amusement park merry-go-round that rotates at 3.00 rpm if she is 8.00 m from its center? Compare each force with her weight.