1. The problem statement, all variables and given/known data I've been asked to complete a report on an ancient weapon (Trebuchet chosen) for a final year paper. Basically its to be structured like this: - An introduction including a brief history of the ancient weapon i.e where it was used, why etc. - An explanation of the general physics used in the analysis of the weapon including formulae - A detailed description of the parts of the weapon and how they work together from a physics point of view including referenced diagrams - Some worked mathermatical and descriptive examples to its use for analysis - A conclusion summarising your anaylsis of your chosen weapon. Now, while I have the topic and structure of it set down I'm still searching for more ways that I can explain how a trebuchet works using physics. 2. Relevant equations I've done equations for the following things: Angular velocity, GPE, KE, Acceleration, Gravity, Projectile Motion, Force, Velocity, Centripetal Force, Centripetal Acceleration. I also talk about the following: Friction, Mass, Wind Resistance, Vertical/Horizontal Velocity, Vertical/Horizontal Displacement, Weights etc. I know this isn't very advanced seeing how I'm in a final year highschool physics class, but I'm really trying to seperate myself from the pack. I just need to find more things to talk about.