when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. History of biomechanics – history of the study of the structure and function of biological systems such as humans, animals, plants, organs, and cells by means of the methods of mechanics. History of classical mechanics – history of the one of the two major sub-fields of mechanics, which is concerned with the set of physical laws describing the motion of bodies under the action of a system of forces. History of continuum mechanics – history of the branch of mechanics that deals with the analysis of the kinematics and the mechanical behavior of materials modeled as a continuous mass rather than as discrete particles. History of fluid mechanics – history of the study of fluids and the forces on them. History of quantum mechanics – history of the branch of physics dealing with physical phenomena where the action is on the order of the Planck constant. History of thermodynamics – history of the branch of physical science concerned with heat and its relation to other forms of energy and work. History of nuclear physics – history of the field of physics that studies the building blocks and interactions of atomic nuclei. History of optics – history of the branch of physics which involves the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it. History of particle physics – history of the branch of physics that studies the existence and interactions of particles that are the constituents of what is usually referred to as matter or radiation. History of psychophysics – history of the quantitative investigations of the relationship between physical stimuli and the sensations and perceptions they affect. History of plasma physics – history of the state of matter similar to gas in which a certain portion of the particles are ionized. History of polymer physics – history of the field of physics that studies polymers, their fluctuations, mechanical properties, as well as the kinetics of reactions involving degradation and polymerization of polymers and monomers respectively. History of quantum physics – history of the branch of physics dealing with physical phenomena where the action is on the order of the Planck constant. History of the theory of relativity - history of the special and the general theory of relativity History of special relativity