Just a quick question: I was wondering whether the Force Applied to a spring equates to the stress and whether the Displacement of a spring equates to the strain. I have been researching this on the internet and the units of stress are completely different to Force Applied and the same for displacement and strain. Thus, I have been wondering whether they mean the same thing or whether I will have to do conversions? Thank you very much for your help. Also, is Young's Modulus or the Elastic Modulus the constant of a stress vs. strain graph or Force vs. Displacement because I read on a website it is measured in GPa and I was under the impression that the Elastic Modulus had no units.