SSC JE Civil Engineering 2017 Set 3 Solved Paper

The shear modulus is also known as the rigidity. Shear modulus = (shear stress)/(shear strain) = (F/A)/(x/y) . This equation is a specific form of Hooke's law of elasticity. Because the denominator is a ratio and thus dimensionless, the dimensions of the shear modulus are those of force per unit area.