Stress: The force of resistance per unit area, offered by a body against deformation is known as stress.
Mathematically stress is written as
f=P/A
Where f= stress
P=external force or load
A=cross-sectional area.
Unit of stress: stress is represented in N/m2
Strain: The ratio of change in dimension to the orginal dimension when subjected to an external load is termed as strain and is denoted by e. It has no unit.
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