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Edexcel A-Level Physics AS 1.4.32 Elastic Strain Energy Questions

Practise Edexcel IAL Physics 1.4.32 by calculating elastic strain energy from 1/2Fx or graph areas, estimating hysteresis losses and comparing energy stores.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • calculate elastic strain energy from 1/2Fx or the area under a force-extension graph
  • estimate energy transferred to internal stores from loading-unloading hysteresis loops
  • compare stored elastic energy with gravitational or kinetic energy in ropes and springs

Edexcel A-Level Physics AS 1.4.32 Elastic Strain Energy Questions question 1

[Maximum number: 5]

A steel object is held by an electromagnet. The magnetic force prevents the steel object falling.

The electromagnet is suspended from a support by a steel cable, as shown.

Figure for Question Edexcel A-Level Physics AS 1.4.32 Elastic Strain Energy Questions question 1 — Edexcel A-Level Physics AS

The force-extension graph for the steel cable is shown below.

Figure for Question Edexcel A-Level Physics AS 1.4.32 Elastic Strain Energy Questions question 1 — Edexcel A-Level Physics AS

When the electromagnet is switched off, the steel object falls.
A student states that "the change in elastic strain energy stored in the cable will be transferred to the gravitational potential energy of the electromagnet".

Discuss the student's statement. You should add to the force-extension graph as part of your discussion.

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