1.4.32 - Elastic strain energy

Calculate elastic strain energy using ΔEel = ½FΔx and the area under a force–extension graph, including estimating areas for linear and non-linear graphs.

Use - elastic strain energy to connect the rule to the data and decision in the question.

This matters because - elastic strain energy determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - elastic strain energy to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Elastic strain energy is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.