So I am working on a cart and the last thing I can not figure out is the math to the braking system. It is relatively simple, though I have over complicated it. I am lost with how to add the multiple levers in play. So lets begin. Problem 1) What is the ratio of force between input and output? Problem 2) The braking apparatus I am designing has two sets of levers on either side identical to a scissor clamp. I can't even fathom how to figure that out, Problem 3) From the braking system, it will then be ran by cable to a simple hand lever at about 5:1, or 6:1.... How does that add up with the scissor clamp? Totally lost, I know I have probably not given all the required information, so please tell me what you need to help me figure this out. Also, I am not looking for someone to give me the exact answer, I like to figure things out as well, just have no idea how to actually figure it out. Thank you for any help.