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Question
Long answer type question.
State Hooke’s law.
Solution
Statement:
Within the elastic limit, stress is directly proportional to strain.
Explanation:
- According to Hooke’s law,
Stress ∝ Strain
∴ `"Stress"/"Strain" = "constant"`
This constant of proportionality is called modulus of elasticity. - Modulus of elasticity of a material is the slope of the stress-strain curve in elastic deformation region and depends on the nature of the material.
- The graph of strain (on X-axis) and stress (on Y-axis) within elastic limit is shown in the figure.
Stress versus strain graph within elastic limit for an elastic body
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