IGCSE Physics / Forces and shape
Force-extension graphs and Hooke's law
Edexcel International GCSE Physics (4PH1), chapter 2: Forces and shape, specification point 1.23, 1.24. Part of the full course.
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Hooke’s law describes how a spring’s extension changes with force, up to the limit of proportionality. Force-extension graphs also show whether an object behaves elastically or plastically when the force is removed.