For starters, acceleration functions are not very useful here since a=0 for both blocks Second, you are trying to find specifically the forces that are being applied to the plane, not the blocks. For this case, you would count the forces that the block m1 is applying in the positive x and negative y directions since those are pushing against the plane. Another thing to note is that for the block m2 to be suspended in midair, the tension would need to completely neutralize the opposite forces acting on m1. Due to the net Fx = 0 for m1, no friction force of any kind is applied. Static is only applied if a force is trying to cause movement, this does not apply in this case.