Class 11 Physics Mechanical Properties of Solids Longitudinal Strain

Types of Strain: Longitudinal Strain

  • Change in length to the original length of the body due to the longitudinal stress.
  • If we apply longitudinal stress to a body either the body elongates or it compresses this change along the length of the body. This change in length is measured by Longitudinal Strain.
  • Longitudinal Strain = ΔL/L
  • Mathematically
    • Consider a rod whose initial length is L after elongation length becomes L’.
    • So the change in length is ΔL= L’ – L
    • So Strain= ΔL/L
  • Strain occurs as a result of stress.

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