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CAIE A-Level Physics 6.2.2 Work from Force–Extension Graphs

Practise interpreting force–extension graph area as work or stored energy, estimating triangular or irregular regions and identifying dissipated energy.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • explain that the area under a force–extension graph represents the work done in deforming the material
  • calculate or estimate work done from the area under a force–extension graph, including triangular or irregular regions

6.2.2—The area under the force–extension graph represents the work done question 1

[Maximum number: 2]

Fig. 4.1 shows the variation with extension x of the tensile force F for two wires, G and H, made from the same material.

Fig. 4.1

Fig. 4.1

The elastic limit has not been exceeded for G or H.

For the lines in Fig. 4.1:

explain why the area under the line represents the elastic potential energy of the wire.

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