Solid mechanics is the study of how solid materials behave and interact when they are put under pressure or stress. The materials can be anything from metal to wood to rubber. In solid mechanics, scientists and engineers study and calculate the effects of forces, such as pressure and friction, on solid materials. This helps them figure out how strong the materials need to be and how they might react in certain situations, like if they are bent or stretched. Solid mechanics helps engineers create structures and machines that can handle a lot of pressure and work efficiently.