1. The problem statement, all variables and given/known data I was really unsure as to where to post this problem as it's got nothing to do with homework, yet it's a homework like problem. Please let me know if I've posted it in the wrong sub-forum. It was a simple discussion at work where we debated how strong a winch we need to lift the trailer ramp. I think all the details here are in the picture. The question is how much force will be needed at the winch to pull up the ramp. The winch's "strength" is measured in kg. Will 1000kg be enough? 2. Relevant equations 3. The attempt at a solution Personally, I think it'll be around 300-400kg, but I'm not sure how to explain my assumption. My thinking is like this: It weighs 100kg. If I were to pull it straight up at the middle, I assume it would be with a force under 100kg. Since there's a 45 degree or so for the wire, I'll multiply it by 2. + loss at the pulley. Then I just added some kg "to be on the safe side" and that's where my assumption is from. I don't need any very in depth mathematical analysis although a rough "guide" would be ace. Again, I'm sorry if I've posted on the wrong forum.