A child pushes a merry go-round from rest to a final angular speed of 0.78 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 1.6 revolutions. What is the angular acceleration of the merry go-round?

Question

v=d/t
.78rev/s = 1.6 rev / t
t= 1.6 rev/ .78 rev/s = 2.055 s
a= delta v/delta t

.78rev/s / 2.055s = .3804 rev/s/s

.3804 rev/s/s * 2pi = 2.39 rad/s

this is apparently wrong according to my online hw. Where did i go wrong?

Answer 1

Sex