The area under the extension-load graph Of an elastic material whose elastic limit has not been exceeded gives its:
Correct answer: B. Strain energy
- A. Stress
- B. Strain energy
- C. Strain
- D. Young modulus
Explanation
Strain energy is the energy stored by an object undergoing deformation. Area under the extension-load graph represents work done to cause the deformation. An object which has not reached its elastic limit, the work done during stretching is recovered when it is unloaded.
This question appeared on the UHS MDCAT 2019 paper, which you can sit online with every answer explained.
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About Deformation and Elasticity
Deformation and elasticity describe how solids change shape or volume under an applied force and return to their original form when the force is removed. Work includes stress, strain, Hooke’s law, elastic limit, Young’s modulus and elastic potential energy, while elastic deformation must be distinguished from permanent plastic deformation.
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