1. The problem statement, all variables and given/known data In a cylinder & piston system, where is the weakest point on the cylinder (the point that will break under increasing pressure)? You may assume the joint between edges are as strong as the material. This is homework for A-level students. 2. Relevant equations P = F/A Surface Area of Flat Surface= πr2 Surface Area of Curved Surface = 2πrl 3. The attempt at a solution F = PA, if 2l > r, then curved surface will face more force and will break first?