Find the normal force in terms of g, m, θ and α. There is no friction. a=0, θ≠α
See first attachment for diagram
The Attempt at a Solution
I drew a free body diagram including the forces; normal, mg, and |FA| (See second attachment) I'm not sure if this is complete as I don't know where α would be part of it.
However I did start with this,
mg=η/cosθ (eq'n 1)
|FA|-mgsinθ=max (sub eq'n 1 in)