Average Angular Momentum Conservation? mω

[StevenJacobs990]

My textbook talks about the average angular speed that ω = angular displacement / time for the angular displacement to take place.

So the question is like there is m₁v₁ = m₂v₂, can the velocity be instead average angular speed to have the conservation of momentum equation like this?
m₁ω₁ = m₂ω₂

 

[DrClaude]

There is conservation of angular momentum. You need to replace mass by moment of inertia:
I₁ω₁ = I₂ω₂