Young modulus
What Young modulus means in Physics A-Level, as defined for AQA, OCR.
Definitions of Young modulus
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Reference: OCR
E = σ/ε, equivalently FL/(AΔL), in Pa; it applies only within the elastic limit, where stress is proportional to strain.
The gradient of the straight-line region of a stress–strain curve, equal to stress divided by strain, in Pa.
The ratio of tensile stress to tensile strain, E = σ/ε, for a material obeying Hooke’s law.
Given by the gradient of the initial linear region of a stress–strain graph.
Topics that use Young modulus
- Bulk properties of solids (AQA A-Level)
- Mechanical properties of matter (OCR A-Level)
Related terms
- Elastic limit
- Hooke's law
- Hooke's law behaviour
- Tensile strain
- Tensile stress
- Breaking stress
- Brittle
- Brittle versus ductile force–extension graphs
Using Young modulus in the exam
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