You desire to accelerate a small merry-go-round from rest to the rotational speed of (1/4) one-fourth of a revolution per second by pushing tangentially on it. Suppose the merry-go-round is a disk having a mass of 150 kg and having radius of 1.60 m.
Avoiding friction, determine how hard do you have to push tangentially to achieve this in 9.00 s? (Employ energy techniques and suppose a constant push on your part.)