WJEC A Level Physics

WJEC A Level Physics 1.5 Solids Under Stress Exam Questions

Free WJEC A Level Physics exam questions on 1.5 Solids Under Stress, with mark schemes. Covers Hooke's law, stress, strain, Young modulus and material behaviour.

1.5 Solids Under Stress exam questions

1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.

1.5 Solids Under StressQuestions and mark scheme

StemUp mark scheme flashcards A Level Physics Flashcards Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page. View flashcards

About WJEC A Level Physics 1.5 Solids Under Stress

This topic covers how materials deform.

What you need to know

Hooke's law F = kx up to the limit of proportionality.
Stress and strain σ = F/A, ε = Δl/l; Young modulus E = σ/ε.
Energy stored Area under a force-extension graph, ½Fx.
Materials Ductile, brittle and polymeric behaviour, including elastic and plastic deformation.

Common mistakes in 1.5 Solids Under Stress

Using diameter instead of cross-sectional area.
Confusing elastic limit and limit of proportionality.
Forgetting strain has no units.

Try three 1.5 Solids Under Stress exam-style questions

1. A wire of area 2.0 x 10⁻⁷ m² carries 40 N. Find the stress. (1 mark)

Show the mark scheme answer

2.0 x 10⁸ Pa.

2. Describe how to measure the Young modulus of a wire. (3 marks)

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Measure original length and diameter with a micrometer (1); add masses and measure extension with a vernier (1); plot stress against strain and use the gradient (1).

3. Explain what plastic deformation means. (1 mark)

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The material does not return to its original shape when the load is removed.