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Edexcel IGCSE Physics 1.23 Hookes Law Region Questions

Hooke’s law applies while extension is directly proportional to applied force. On a force-extension graph, this appears as a straight line through the origin; curved or changing-gradient sections show that the relationship no longer holds.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • State Hooke’s law as extension being directly proportional to force up to the limit of proportionality.
  • Recognise a straight force-extension line through the origin as showing that Hooke’s law is obeyed.
  • Use a curved or changing-gradient force-extension graph to show that the material no longer obeys Hooke’s law.

Edexcel IGCSE Physics 1.23 Hookes Law Region Questions question 1

[Maximum number: 1]

A student stretches a rubber band.

The diagram shows a force-extension graph for a rubber band.

Figure for Question Edexcel IGCSE Physics 1.23 Hookes Law Region Questions question 1 — Edexcel IGCSE Physics

State how the graph shows that the rubber band does not obey Hooke's law.

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