elasticity (strain)

Question

In the context of elasticity, strain is defined as the ratio of which two quantities?

RankGuru · Accepted Answer

Strain ($\epsilon$) is a measure of the deformation of a body relative to its original dimensions. For longitudinal deformation (tensile or compressive):
$	ext{Strain} = \frac{	ext{Change in Length (}\Delta L	ext{)}}{	ext{Original Length (}L	ext{)}}$
- **Units**: Since it is a ratio of two identical physical quantities, strain is a **dimensionless** and unitless quantity. 
Other types include volume strain ($\Delta V/V$) and shear strain (tangential displacement divided by height).

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elasticity (strain)

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