1. The problem statement, all variables and given/known data The object is a crane arrangement of pipes that falls forward without any loads or counterweights on it. We can take it apart measure the weight and the length of the individual pieces.How much weight can a tower crane lift without tipping? I just need a general way to solve this problem, not specific numbers. 2. Relevant equations moment/torque = force X distance ƩF = 0 ƩMoments = 0 3. The attempt at a solution I drew a free body diagram of the crane with downward forces to indicate the load, the counterweight, and the center of mass. The upward force was the normal force and one of my equations involved adding the forces together to equal 0, with a variable (l) for the load. I don't know how to calculate the center of mass though, and I'm confused about where I should be taking the moments from. Thanks for your help.