Stress in a Material

The internal; resistance offered per unit area by a material towards the external forces applied is called ‘Stress’. Internal resistance offered is equal to external forces applied on body.

Stress is denoted by 'σ '.

Stress ( σ )   =       P/A

                                                                 

Where ‘P’ denotes the force applied & ‘A’ denotes the cross section area subjected the force P.