ConceptConceptDocsDocuments

CAIE A-Level Physics 6.1.4 Spring Constant k = F/x

Practise calculating spring constant, force or extension from k = F/x and force-extension gradients, including equivalent springs in series or parallel when required.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • calculate the spring constant from k = F/x or from the gradient of a force–extension graph
  • rearrange k = F/x to determine force or extension and maintain consistent units
  • analyse equivalent spring constants for springs or wires connected in series or parallel where the question requires it

6.1.4—The formula for the spring constant k = F / x question 1

[Maximum number: 1]

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:

state what is represented by the gradient

All question bank results loaded