(Part 1) A merry-go-round rotates at the rate of
0.4 rev/s with an 99 kg man standing at a
point 2.5 m from the axis of rotation.
What is the new angular speed when the
man walks to a point 1 m from the center?
Consider the merry-go-round is a solid 73 kg
cylinder of radius of 2.5 m.
Answer in units of rad/s.

(Part 2)

What is the change in kinetic energy due to
this movement?
Answer in units of J.