Young’s modulus is the property of a material that tells us how easy it can deform or stretch when an external force is applied to an object. Mathematically, it is defined as the ratio of tensile stress to tensile strain, where stress is the amount of force applied per unit area and strain is the extension per unit length. Young’s Modulus is only applicable in the zone between the elastic limit. Young’s modulus is used to classify the strength of materials.