3. A horizontal 800.N merry-go-round of radius 1.50 m is started from rest by a constant horizontal force of 50.0 N applied tangentially to the merry-go-round.
(a) Find the kinetic energy of the merry-go-round after 3.00 s. (Assume it is a solid cylinder.)
(b) A 10.0kg mass is dropped vertically onto the merry-go-round at a point 1.40 m from the center of rotation and sticks to the merry-go-round. Determine the final angular speed of the system.
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