1. The problem statement, all variables and given/known data Extreme temperatures have been known to cause some electricity supply pylons to collapse. Using your knowledge of physics, comment on why this happens. (This question is an 'open-ended' question and is worth three marks. One must explain the possible possible reason(s) for what is described in the question) (SQA National 5 Physics Specimen Paper) 2. Relevant equations Assuming that 'extreme temperatures' means extremely cold temperatures, p=F/A could be used to show that a build up of ice on the cables connecting the pylons would put pressure on the cables and potentially pull a pylon down. 3. The attempt at a solution Explaining why p=F/A could be used gives me one mark, but after that, I'm stumped.