Spring mechanics is the study of how springs behave when they are compressed or stretched. Springs store energy when they are deformed and release it when they return to their original shape. The relationship between the force applied to a spring and its displacement is described by Hooke's Law, which states that the force is proportional to the displacement, as long as the elastic limit is not exceeded. Springs are commonly used in various applications, such as in mechanical devices, automobiles, and furniture. They can be classified into different types, including compression springs, tension springs, and torsion springs, each serving specific functions based on their design and the forces they encounter.