# LAQ : State and explain Hooke’s law. Define longitudinal stress, longitudinal strain and Young’s modulus

Question 12

State and explain Hooke’s law. Define longitudinal stress, longitudinal strain and Young’s modulus.

Hooke’s law states that the force required to extend or compress a spring by a distance is directly proportional to that distance. In other words, the more you stretch or compress a spring, the more force it will require. This relationship is known as the spring constant, and it is a measure of the stiffness of the spring. Hooke’s law is used to describe the behaviour of springs and other elastic materials.

• Longitudinal stress: The stress that occurs when a force is applied in the longitudinal direction of a material, causing it to elongate or compress.
• Longitudinal strain: The resulting deformation of a material caused by the application of longitudinal stress.
• Young’s modulus: A measure of the stiffness of a material, defined as the ratio of longitudinal stress to longitudinal strain.

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