Objectives

Lesson outcomes

  • Use the Young modulus as the ratio of stress to strain for a material in the elastic region.
  • Describe how to determine the Young modulus of a metal wire experimentally.
  • Identify the measurements and graph needed to calculate the Young modulus from practical data.
Syllabus

CIE 9702 syllabus points

2 linked

Definitions

Required definitions

  • Stress

    force per unit cross-sectional area.

  • Strain

    extension per unit original length.

  • Young modulus

    stress divided by strain in the linear elastic region.

Lesson Notes

Student guidance and lesson notes

Overview

Use Young’s modulus and connect it to experimental measurement. Use this page to organise the main ideas, worked examples, and linked resources.

What You Need to Know

  • Core practical focus: Use Young’s modulus and connect it to experimental measurement.
  • Identify the variables, method steps, and data that matter.
  • Note the equipment, safety points, and precision issues to emphasise.

How to Work Through It

  1. Review the question, method, and success criteria for the practical work.
  2. Set up equipment and model any critical measurements or safety points.
  3. Collect results, observations, or graphs with checks on accuracy and control variables.
  4. Review conclusions, anomalies, and how the method could be improved.

Check Your Understanding

  • Check that you can justify the method and identify variables.
  • Try one question on results, anomalies, or evaluation to test understanding.

Common Mistakes

  • Missing control variables, weak measurement technique, or poor recording of data.
  • Safety, setup, or graphing errors that need modelling before you continue.

Next Steps

  • Complete the write-up, analysis, or evaluation.
  • Revisit the method or results in the next lesson if improvement is needed.
Lesson Resources

Materials for this lesson

Use these videos, slide decks, documents, or links to work through the lesson.

Slides

Lesson slides

Teaching slides for the practical lesson.

Open resource