I've seen some problems that talk about a ladder leaning against a frictionless wall, with a person standing on it. The ladder doesn't move(net force = 0). The problem is, I don't know what directions the reactions forces(that is, the force of the wall on the ladder, and of the floor on the ladder) should have. I've seen it solved like this:
where the force of the wall on the ladder is horizontal, and the force of the floor on the wall is vertical, and also in this way:
where the normal force of the wall is said to have both y and x components.
I didn't notice it was leaning against over a corner (and I also wouldn't have thought it would make a difference)
I don't know which interpretation to believe. Is the force of the wall always perpendicular to the wall itself? Or it can it have y and x components?