physics

You wish to accelerate a small merry-go-round from rest to a rotational speed of one-fourth of a revolution per second by pushing tangentially on it. Assume the merry-go-round is a disk with a mass of 150 kg and a radius of 1.80 m. Ignoring friction, how hard do you have to push tangentially to accomplish this in 8.00 s? (Use energy methods and assume a constant push on your part.)

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