BRAINCAKEExam Style Question - 1
Question
A spring obeys Hooke's law. A force of 12 N stretches it by 4.0 cm.
(a) Calculate the stiffness k of the spring. (2 marks)
(b) Calculate the elastic strain energy stored when the extension is 4.0 cm. (2 marks)
(c) The spring is stretched further, to an extension of 6.0 cm, still within its limit of proportionality. Calculate the new force and the total energy stored. (3 marks)
(d) State how the energy stored could be found if the spring had been stretched beyond its limit of proportionality. (1 mark)
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Key terms in this lesson
- elastic strain energy
- The energy stored in a stretched or compressed elastic object, equal to the work done deforming it.
- limit of proportionality
- The point on a force-extension graph up to which the extension of a material is directly proportional to the applied force.
More in Solid Materials
- The Young Modulus
- Stress-Strain Graph Metal Wire
- Experiment to Measure the Young Modulus
- Properties of Materials
- Exam Style Question - 1
- Exam Style Question - 1
- Springs in Series
- Springs in Parallel
All 14 lessons in Solid Materials · All Edexcel AS-level Physics topics