What is the definition of stress ?

MCQ  

What is the definition of stress ? 





Options 

A) force per unit length 

B) force per unit deformation

C) deformation per unit length 

D) force per unit area


Correct answer : option D ( solution discussed below)



Solution

The stress is a ratio normal stress per unit cross section area.

Stress
         = Force
             Area 

When load (force) is applied on body that time body get deformed and this normal force per unit cross section area is called as normal stress.
So the stress is a ratio of force per unit area



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