Modulus of elasticity : It is the ratio stress applied on a body to the strain produced in the body.
k = (stress/ strain); *.I unit → N/m2 (or) Pascal
Stress : When a body is subjected to an external force, the force per unit area is called stress.
Stress = (force/ area) = (F/A); *.I unit → N/m2 (or) Pascal
Strain : When deforming forces act on a body, the fractional deformation produced in the body. It has no units
*Poisson' ratio (σ) :* The ratio between lateral strain to longitudinal strain of a body is called poisson' ratio.
σ = (lateral strain/ longitudinal strain)
