Continuum mechanics is a branch of physics that studies the behavior of materials as continuous masses rather than discrete particles. It focuses on how solids, liquids, and gases deform and flow under various forces. By treating materials as continuous, scientists can analyze complex phenomena like stress, strain, and fluid dynamics, which are essential in fields like engineering and materials science. In continuum mechanics, key concepts include stress, which measures internal forces within a material, and strain, which describes how materials change shape. This framework helps engineers design structures, predict how materials will behave under load, and understand natural processes like earthquakes and ocean currents.