A force applied with strength to extreme or beyond the capacity is stress. Application of stress is in order to sustain, defend, defeat, or achieve the objective. A stress has both negative and positive impacts that lead to strain. The consequence of stress is strain that means the disturbances resulted due to stress imbalances the arrangement. Continuous stress in one stage increases the capacity and makes powerful on the other hand disturbs internal structure and damages it. A stress applied physically leads to physical strain and if mental gives mental strain. Strain is a sort of pain caused by the disturbances.

Whether physical or mental that disturbs smooth going deteriorates formation. It is like an elastic tape, which is stretchable but has limit to it, trying to stretch over the limitation would only damage the tape. In one way, strain and stress are same, begins from stress, and ends at strain. Thus, the stress is stretch and strain is pain or the outcome. Finally, we call in normal language is