Young's Modulus is a mechanical property that measures the stiffness of a solid material. It tells us how easily a material can bend or stretch. It is a core concept in the study of Elasticity in Class 11 Physics.
Because Stress is essentially Force/Area, the dimensional formula of Young's Modulus is identical to the dimensional formula for Pressure.
The SI unit of Young's Modulus is Pascals (Pa) or Newtons per square meter ($N/m^2$).
Young's Modulus ($Y$) is defined as the ratio of tensile stress to tensile strain. Formula: $Y = \frac{\text{Stress}}{\text{Strain}}$
Since Strain is dimensionless, the dimensional formula of Young's Modulus is exactly the same as the dimensional formula of Stress.
Final Dimensional Formula = $[M^1 L^{-1} T^{-2}]$
Steel has a vastly higher Young's Modulus than rubber. In physics, steel is considered much more 'elastic' than rubber because it requires much more force to deform it, and it snaps back to its original shape forcefully.
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