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For a solid object moving through a fluid or gas, drag is the sum of all the aerodynamic or hydrodynamic forces in the direction of the external fluid flow. It therefore acts to oppose the motion of the object, and in a powered vehicle it is overcome by thrust. A subset of the phases of matter, fluids include liquids, gases, plasmas and, to some extent, plastic solids. ...
Gas (actually, as), the GNU assembler, is the default GCC back-end. ...
Aerodynamics is a branch of fluid dynamics concerned with the study of gas flows, first analysed by George Cayley in the 1800s. ...
Hydrodynamics is fluid dynamics applied to liquids, such as water, alcohol, oil, and blood. ...
In physics, a force is an external cause responsible for any change of a physical system. ...
For the land-speed record breaking car, see ThrustSSC and Thrust2 For the computer game, see Thrust (computer game) Thrust is a reaction force described quantitatively by Newtons Second Law when a system expels or accelerates mass in one direction to propel a vehicle in the opposite direction. ...
Types of drag are generally divided into three categories: parasitic drag, lift-induced drag and wave drag. Parasitic drag includes form drag, skin friction and interference drag. Lift-induced drag is only relevant when wings or a lifting body are present, and is therefore usually discussed only in the aviation perspective of drag. Beyond these two kinds of drag there is a third kind of drag, called wave drag, that occurs when the solid object is moving through the fluid at or near the speed of sound in that fluid. The overall drag of an object is characterized by a dimensionless number called the drag coefficient, and is calculated using the drag equation. Assuming a constant drag coefficient, drag will vary as the square of velocity. Thus, the resultant power needed to overcome this drag will vary as the cube of velocity. Parasitic drag is drag caused by moving a solid object through a fluid. ...
In aerodynamics, lift-induced drag, or more simply, induced drag, is a drag force arising from the generation of lift by wings or a lifting body during flight. ...
Wave drag is an aerodynamics term that refers to a sudden and very powerful form of drag that appears on aircraft flying at high-subsonic speeds. ...
In aerodynamics, form drag, profile drag, or pressure drag, is a component of parasitic drag. ...
In Aerodynamics, skin friction is the component of parasitic drag arising from the friction of the fluid against the skin of the object that is moving through it. ...
In aerodynamics, interference drag is a component of parasitic drag which is caused by vortices. ...
A Laughing Gull on the beach in Atlantic City. ...
The lifting body is an aircraft configuration where the body itself produces lift. ...
Wave drag is an aerodynamics term that refers to a sudden and very powerful form of drag that appears on aircraft flying at high-subsonic speeds. ...
The speed of sound c (from Latin celeritas, velocity) varies depending on the medium through which the sound waves pass. ...
In dimensional analysis, a dimensionless number (or more precisely, a number with the dimensions of 1) is a pure number without any physical units; it does not change if one alters ones system of units of measurement, for example from English units to metric units. ...
The drag coefficient (Cd or Cx) is a number that describes a characteristic amount of aerodynamic drag caused by fluid flow, used in the drag equation. ...
In physics, the drag equation gives the drag experienced by an object moving through a fluid. ...
Wind resistance is a layman's term used to describe drag. Its use it often vague, and is usually used in a relative sense (e.g. A badminton shuttlecock has more wind resistance than a squash ball). This article is about the racquet sport badminton. ...
Squash racquet and ball Squash is an indoor racquet sport which was, until recently, called Squash Rackets, a reference to the squashable soft ball used in the game (compared with the harder ball used in its parent game Racquets or Rackets--see below). ...
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