A 400-Kg Child Running at a Speed 3

Multiple Choice

A 40.0-kg child running at a speed 3.00 m/s jumps on a stationary playground merry-go-round at a distance 1.50 m from the axis of rotation of the merry-go-round. The child is traveling tangential to the edge of the merry-go-round which has a 600 kg∙m² moment of inertia about its axis of rotation as she is running. What is the angular speed of the merry-go-round after the child jumps on it?

A) 0.788 rad/s
B) 0.261 rad/s
C) 6.28 rev/s
D) 2.00 rad/s
E) 3.14 rev/s