A force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle 15 degrees. The positive direction of the x axis is up the plane. Coefficient of static friction is us = .5 and uk = 0.34. Find frictional force in unit vector notation, when P = -5i. Normally, I'd call them liars and call the positive x direction to be, well, the positive x direction, and break that value for P into components. However, I can tell they REALLY want me to use a different plane. I have no idea what it should look like. Everything I've tried doesn't work and I am getting a headache. I know I should break gravity down into it's components for this abnormal plane, and that P should run along x and normal force should run along y, but that gives me a diagram suggesting that the normal force is unaffected by p, but I KNOW that this isn't the case.