# Dynamics

Every object experiences some form of motion which is the result of different forces acting on the object. Dynamics is the study of the forces which are responsible for this motion. Dynamics (from Greek δυναμικός dynamikos "powerful", from δύναμις dynamis "power") may refer to:

## Physics and engineering

• Dynamics (mechanics),
• Aerodynamics, the study of gases in motion
• Analytical dynamics, the motion of bodies as induced by external forces
• Anomalous dynamics (Random walk#Anomalous diffusion), the stochastic motion of objects with mean squared displacement (MSD) that deviates from the relation for normal dynamics, MSD~t, where t is the time the process is seen; anomalous dynamics are either faster than normal dynamics (MSD>t) or slower (MSD<t)
• Astrodynamics, also known as Orbital mechanics for both near earth and planetary motion (also called Celestial mechanics when used in that sense).
• Brownian dynamics, the occurrence of Langevin dynamics in the motion of particles in solution (e.g. a grain in water, as was first seen by Brown); its famous property is: MSD~t, where MSD is the mean squared displacement, and t is the time the process is seen
• File dynamics, stochastic motion of particles in a channel
• Flight dynamics, the science of aircraft and spacecraft design
• Fluid dynamics or hydrodynamics, the study of fluid flow
• Fractional dynamics, studies the dynamics with integrations and differentiations of fractional orders (in physics, economics, and related fields)
• Molecular dynamics, the study of motion on the molecular level
• Normal dynamics, is a stochastic motion having a Gaussian probability density function in position with variance MSD that follows, MSD~t, where MSD is the mean squared displacement of the process, and t is the time the process is seen (normal dynamics and Brownian dynamics are very similar; the term used depends on the field)
• Langevin dynamics, a mathematical model for stochastic dynamics; used in modeling molecules, yet also the stock market and other systems
• Quantum chromodynamics, a theory of the strong interaction (color force)
• Quantum electrodynamics, a description of how matter and light interact
• Relativistic dynamics, a combination of relativistic and quantum concepts
• Single file dynamics (also termed file dynamics), the diffusion of particles in a channel
• Stellar dynamics, a description of the collective motion of stars
• System dynamics, the study of the behavior of complex systems
• Thermodynamics, the study of the relationships between heat and mechanical energy

## Computer science and mathematics

• Dynamic data structure, a structure where the data elements may change
• Dynamical system, a concept describing a point's time dependency
• Dynamic programming, a method of solving complex problems by breaking them down into simpler steps
• Dynamic program analysis, a set of methods for analyzing computer software
• Dynamic HTML, an umbrella term for a collection of technologies used together to create interactive and animated web sites
• Dynamic web page, a web page with web content that varies based on parameters provided by a user or a computer program