A child pushes a merry go-round from rest to a final angular speed of 0.4 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 1.1 revolutions. What is the angular acceleration of the merry go-round?

Question

I got .0727 but that doesn't seem to be the right answer

Answer 1

t = 1.1rev / 0.4rev/s = 2.75s.

a = Vf - Vo) / t,
a = (0.4 - 0) / 2.75 = 0.145 rev/s^2.