Forgive me if this is in the wrong category. I have a product I am working out - I am a programmer and electronic engineer by trade, which didn't include a lot of work with physics principles. I have a lever system which seems simple - but the trick is, my load is acting as a lever too. See the attached picture. In the bottom left is my load. It is 3 lbs. I want to attach it to the end of the lever in the bottom right. My assumption has been that I would find the center mass of my load to determine how much longer my lever arm becomes with the load attached. At the top of the picture, I sketch my 'assumed' equivalent system. I am right? If so, is it correct that I need 46x the force on the left side of the lever to raise my 3lbs => 138lbs Thanks in advance for the brainpower!