Mechanics | Definition, Examples, Laws, & Facts | Britannica
Mechanics, branch of physics concerned with the motion of bodies under the action of forces, including the special case in which a body remains at rest. Historically, mechanics was among the first of the exact sciences to be developed. It may be divided into three branches: statics, kinematics, and kinetics.
Fluid mechanics | Definition, Equations, Types, & Facts | Britannica
fluid mechanics, science concerned with the response of fluids to forces exerted upon them. It is a branch of classical physics with applications of great importance in hydraulic and aeronautical engineering, chemical engineering, meteorology, and zoology.
Mechanical engineering | Design, Manufacturing & Automation
Mechanical engineering, the branch of engineering concerned with the design, manufacture, installation, and operation of engines and machines and with manufacturing processes. It is particularly concerned with forces and motion.
Strain | Deformation, Stress & Elasticity | Britannica
strain, in physical sciences and engineering, number that describes relative deformation or change in shape and size of elastic, plastic, and fluid materials under applied forces.The deformation, expressed by strain, arises throughout the material as the particles (molecules, atoms, ions) of which the material is composed are slightly displaced from their normal position.
Mechanics of solids | Physics, History, & Basic Principles | Britannica
mechanics of solids, science concerned with the stressing, deformation, and failure of solid materials and structures. What, then, is a solid? Any material, fluid or solid, can support normal forces. These are forces directed perpendicular, or normal, to a …
Classical mechanics | physics | Britannica
The mathematics of classical mechanics effectively recognized three types of attractor: single points (characterizing steady states), closed loops (periodic cycles), and tori (combinations of several cycles).
Motion | Definition, Types, & Facts | Britannica
2024年11月23日 · However, motion at speeds close to the speed of light must be treated by using the theory of relativity, and the motion of very small bodies (such as electrons) must be treated by using quantum mechanics.
Kinetics | Reaction, Equations & Rates | Britannica
kinetics, branch of classical mechanics that concerns the effect of forces and torques on the motion of bodies having mass. Authors using the term kinetics apply the nearly synonymous name dynamics (q.v.) to the classical mechanics of moving bodies.
Energy | Definition, Types, Examples, & Facts | Britannica
2024年10月28日 · Usable mechanical or electrical energy is, for instance, produced by many kinds of devices, including fuel-burning heat engines, generators, batteries, fuel cells, and magnetohydrodynamic systems. In the International System …
Gear | Types, Ratios & Applications | Britannica
2024年11月7日 · gear, machine component consisting of a toothed wheel attached to a rotating shaft.Gears operate in pairs to transmit and modify rotary motion and torque (turning force) without slip, the teeth of one gear engaging the teeth on a mating gear. If the teeth on a pair of mating gears are arranged on circles, i.e., if the gears are toothed wheels, the ratios of the …