Class 11 Physics Mechanical Properties of Solids Strain


  • Strain is a measure of deformation representing the displacement between particles in the body to a reference length. 
  • It tells us how and what changes takes place when a body is subjected to strain. 
  • Mathematically:-  Strain = ΔL/L , where ΔL=change in length L= original length
  • It is dimensionless quantity because it is a ratio of two quantities. 
  • For example: - If we have a metal beam and we apply force from both sides the shape of the metal beam will get deformed. 
  • This change in length or the deformation is known as Strain.

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