dynamics

dynamics, branch of mechanics that deals with the motion of objects; it may be further divided into kinematics, the study of motion without regard to the forces producing it, and kinetics, the study of the forces that produce or change motion. Motion is caused by an unbalanced force acting on a body. Such a force will produce either a change in the body's speed or a change in the direction of its motion (see acceleration). The motion may be either translational (straight-line) or rotational. With the principles of dynamics one can solve problems involving work and energy and explain the pressure and expansion of gases, the motion of planets, and the behavior of flowing liquids and gases. Solids are rigid, having a definite shape, but fluids (liquids and gases) are not, and special branches of dynamics have been developed that treat the particular effects of forces and motions in fluids. These include fluid mechanics, the study of liquids in motion, and aerodynamics, the study of gases in motion. The applications of liquids both at rest and in motion are studied under hydraulics, a branch of engineering closely related to dynamics. The principles of dynamics may also be combined with the study of other phenomena, as in electrodynamics, the study of charges in motion.

Branch of mechanics that deals with the motion of objects in relation to force, mass, momentum, and energy. Dynamics can be divided into two branches, kinematics and kinetics. The foundations of dynamics were laid by Galileo, who derived the law of motion for falling bodies and was the first to recognize that all changes of velocity of a body are the result of forces. Isaac Newton formulated this observation in his second law of motion (see Newton's laws of motion).

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Dynamics (from Greek δυναμικός - dynamikos "powerful", from δύναμις - dynamis "power") may refer to:In Physics:

• Dynamics (physics), in physics, dynamics refers to time evolution of physical processes
• Analytical dynamics in physics, refers to the motion of bodies as induced by external forces
• Relativistic dynamics may refer to a combination of relativistic and quantum concepts to describe the relationships between the motion and properties of a relativistic system and the forces acting on the system. It may also refer simply to the impact of special relativity upon classical dynamics.
• Molecular dynamics
• Gravitational dynamics, the study of the dynamics of systems dominated by gravitational force
• Thermodynamics, a branch of physics that studies the relationships between heat and mechanical energy using macroscopic variables such as temperature, pressure, and volume
• Fluid dynamics, the study of liquids and gasses in motion
• In quantum physics, dynamics may refer to how forces are quantized, as in quantum electrodynamics or quantum chromodynamics.Other:
• System dynamics, the study of the behaviour of complex systems
• A Dynamical system in mathematics or complexity.
• Dynamics (music), In music, dynamics refers to the softness or loudness of a sound or note. The term is also applied to the written or printed musical notation used to indicate dynamics.
• Group dynamics, the study of social group processes
• Psychodynamics, the study of the interrelationship of various parts of the mind, personality, or psyche as they relate to mental, emotional, or motivational forces especially at the subconscious level
• Neurodynamics, an area of research in the brain sciences which places a strong focus upon the spatio-temporal (dynamic) character of neural activity in describing brain function
• Power dynamics, the dynamics of power, used in sociology
• Dynamic programming in computer science and control theory.
• Dynamic program analysis, in computer science is a set of methods for analyzing code that is performed with executing programs built from that software on a real or virtual processor.
• Microsoft Dynamics is a line of business software owned and developed by Microsoft.

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