in young modulus of a metal bar , we have a horizontal bar on one side we attach some weight so there is some change in angle but no change in length then why it is called young modulus?
Young Modulus, also known as the modulus of elasticity, is a measure of a material's stiffness or resistance to deformation when subjected to stress.
Young Modulus is an important physical property of materials that helps determine their strength and ability to withstand external forces. It is also a key factor in understanding a material's behavior under different conditions and in various applications.
Young Modulus is measured by applying a known amount of stress to a material and measuring the resulting strain. The ratio of stress to strain gives the Young Modulus value for that material.
The Young Modulus of a material can be affected by factors such as temperature, pressure, and composition. Additionally, the structure and arrangement of a material's atoms and molecules can also impact its Young Modulus.
Young Modulus is often confused with other measures of stiffness, such as shear modulus and bulk modulus. However, Young Modulus specifically measures the material's response to tensile or compressive stress, while shear modulus measures its response to shear stress and bulk modulus measures its response to volume changes. Young Modulus is also the most commonly used measure of stiffness for solid materials.