Posted by Shereen on .
A child pushes a merry goround from rest to a final angular speed of 0.4 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.1 revolutions. What is the angular acceleration of the merry goround?
I got .0727 but that doesn't seem to be the right answer

Angular Acceleration 
Henry,
t = 1.1rev / 0.4rev/s = 2.75s.
a = Vf  Vo) / t,
a = (0.4  0) / 2.75 = 0.145 rev/s^2.