# How can two horizontal forces acting at one point be at right angles?

I was looking at this exam question, and i had trouble figuring what it means.

This question is on mechanics.

Two horizontal forces X and Y act at a point O and are at right angles to each other..

I can't seem to understand how it is possible that there can be two horizontal forces acting on a point and are at right angles to each other.

@dsa If it helps, you could conveniently assume that force $X$ acts along the x-axis and force $Y$ along y-axis, the vertical axis being the z-axis. –  Srivatsan Nov 14 '11 at 22:27