A 30 kg child stands on the edge of a stationary merry-go-round of mass 100 kg and radius 2.0 m. The rotational inertia of the merry-go-round about its axis of rotation is 150 kgm2. The child catches a ball of mass 1.0 kg travelling at 16 m/s at an angle Ø=37º thrown by a friend. If the merry-go-round starts at rest, what is the angular speed of the merry-go-round just after the ball is caught.

A 30 kg child stands on the edge of a stationary merry-go-round of mass 100 kg and radius 2.0 m. The rotational inertia of the merry-go-round about its axis of rotation is 150 kgm2. The child catches a ball of mass 1.0 kg travelling at 16 m/s at an angle Ø=37º thrown by a friend. If the merry-go-round starts at rest, what is the angular speed of the merry-go-round just after the ball is caught.