How would one calculate "Tug of war" forces between two vehicles? Hello! I am working on some calculations for an off-road vehicle on which we are working, and I cannot figure out which figures to use. Really, it's where to start. We have two vehicles (600 lbs. and 550 lbs.) with 10 hp engines that will be hitched together in a tug-of-war type setting. The hitches are attached to 4130 Normalized steel tubing, and I'm trying to calculate how much force is transferred (essentially how beefy we need to build it). I know this isn't a lot of information, but I have a huge brain-block. Any tips to get this started would be so appreciated!