This isn't homework, it's for a simple computer program I'm trying to write. It's been a long time since I took a physics class, but I seem to remember getting homework questions like this. http://www.imagechicken.com/uploads/1244655138002459200.png [Broken] If I have a 2D rigid body, I know its mass and the location of its CG. The object is being held by two points, how can I find the forces acting on the two points? I know there are going to be 3 force vectors that must add up to zero. The first one is easy to find, straight down with mass * 9.8. But how do I find the other two? I assume the direction of the vectors is the angle between CG and A and B? If I have one vector and two angles, is that enough to calculate everything I need? Torque must sum to zero as well, but I don't think I need to worry about that. Any tips for solving this in the general case? Any tutorials I should look at? I have one physics text, Physics for Scientists & Engineers, but it only covers this topic with 1 or 2 pages.