Pulley with 2 Blocks on an Inclined Plane. Help please..

1. The problem statement, all variables and given/known data
I’ve been stuck on this problem for hours now. I know it has to be somewhat simple, but I am not too great in physics, so I am asking for help on how to complete this problem.

Two blocks are positioned on surfaces, each inclined at the same angle 50 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of block B is 4.5kg, and the coefficient of friction for both blocks and inclines is .75. Assume gravity is g=10m/[itex]s^{2}[/itex]

Here is the closest picture I can find of it. Its basically the same thing except it is an isosceles triangle.

What must be the mass of block A if both blocks are to slide to the right at a constant velocity?
What must be the mass of block A if both blocks are to slide to the left at a constant velocity?

2. Relevant equations

From all of the info I found online and in books, these are equations that I thought might be needed.

F=ma
Ff=μFn
T=mg? (I am not exactly sure how to get tension..)
Assuming the acceleration is 0, i got 0=Fg+Fn+Ff+T
Fgx=mgsin(θ)
Fgy=mgcos(θ)
So according to above, does Fgy=Fn?
And is T equal for both sides? I am unsure how to set up an equation where I can find which side the blocks are sliding based on the mass of block A. Please help!
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

http://ift.tt/1lwDAQX

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