1. The problem statement, all variables and given/known data These are two of the excercises where I'm supposed to calculate the mechanical advantage of the pulley systems. Excuse the crude MS paint drawings, I do not have access to a scanner or a proper camera. The red dots are where two cables connect. 3. The attempt at a solution Unfortunately I have no idea where and how to even begin. I looked for explanations online but I only found general equations for block and tackle systems, without a proper explanation. It may sound a bit silly, but I just don't understand pulley systems. Thanks in advance!