Consider a freely spinning merry-go-round, which can be treated as a uniform disc of radius R and mass m1 rotating about a vertical axis through its center. Initially the merrygo-round is at rest. A boy of mass m2 jumps with a horizontal speed v, landing at A, which is a distance R 4 from the center. Hint: Neglect the vertical fall of the boy. m , v m R/4 O A R 1 2 As the boy is approaching the merry-goround, what is the magnitude of his initial angular momentum with respect to the center of the merry-go-round