Angular Momentum: A 40.0-kg child running at 3.00 m/s suddenly jumps onto 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 just before jumping on. The moment of inertia about its axis of rotation is 600 kg ? m2 and very little friction at its rotation axis. What is the angular speed of the merry-go-round just after the child has jumped onto 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
Answer: B
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