HOOK'S LAW

Hook’s law is a quantitative relation between stress and strain.

STATEMENT: -

Hook's law states:

"Within elastic limit, strain produced in a body is directly proportional to stress"

i.e. 

Strain ∞ Stress

OR

Strain = (Constant) (Stress)

Where 1/K = constant of proportionality

Strain = (1/K)(Stress)

OR

Stress / Strain = K

OR

Stress / Strain = K

With the help of above equation Hook’s law can also be stated as:

"The ratio of stress to strain is constant."