This revision note includes the whole specification that is needed for this materials topic. Easy to learn, bullet point revision notes Covers every point on the current AQA specification Spec as follow: • Density • Hooke’s law, elastic limit • Stiffness and spring constant • Tensile strain and tensile stress • Elastic strain energy, breaking stress • Energy stored, area under graph Description of plastic behaviour, fracture and brittle behaviour linked to force -extension graphs. Quantitative and qualitative application of energy conservation, examples involving elastic strain energy. Energy transfers- spring energy, gravitational, and potential energy Interpretation of simple stress -strain curves