1. The problem statement, all variables and given/known data A steel girder with a mass of 1000kg and a length of 10m rests on a concrete slab, with 4m overhanging the edge. How far can a 100kg man walk on the girder? 3. The attempt at a solution I supposed that the right end of the slab is the fulcrum (rotating point), and according to the law of equilibrium of rigid bodies, the sum of torques around that point will be zero, If the maximum distance the person could walk is X, then the eqn. will be: 100kg * X m = 1000Kg * 1 m (segma tao = 0) Where: 1 m is the distance between the point of center of gravity of the steel girder (length/2 m)& the fulcrum..... But.....X=10m ! I missed something, but I don't know what? am I proceeding right from the begining?? Thanks in advance for your help..