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Write Hooke's law....

Write Hooke's law.

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"For small deformations the stress and strain are proportional to each other". This is known as Hooke.s law.
stress `prop` `therefore` strain stress `= kxx` strain
where k is the proportionality constant and is known as modulus of elasticity.
Hooke.s law is an empirical law and it is valid for most materials.
However, there are some materials which do not exhibit this linear relationship.
SI unit of k is `Nm^(-2) or Pa`
Dimensional formula is `[M^(1) L^(-1) T ^(-2)]`
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