Okay. If you are most of the way through a semester, it is quite likely you are intimately familiar with stress. However, that is emotional stress. Sadly, while important, I do not have the skills to help you with that. I can help you with understanding mechanical stress. Simply put mechanical stress is like an average force. It is why thick columns are sturdier than thin columns. The average force each part of the column feels is less because the force is spread out.