Robert Hooke was the scientist who gave Hooke’s law.
Hooke’s law states that within the elastic limit, stress developed is directly proportional to the strain produced in a body.
Consider a scenario where we apply external force to the body. As a result stress develops in the body due to this stress there will be a strain produced in the body which implies that there will be some deformation in the body.
Because of stress, strain is produced.
According to Hooke’s law, if strain increases the stress will increase and vice-versa.
The Hooke’s law is applicable to all elastic substances.
It does not apply to plastic deformation.
stress ∝ strain
stress = k × strain
Where k is the proportionality constant and is known as modulus of elasticity.