In fluid dynamics, drag, sometimes referred to as fluid resistance, is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. [1] . This can exist between two fluid layers, two solid surfaces, or between a fluid and a solid surface.

Feb 2, 2023 · The resistance offered by a fluid, like air and water, is called the drag force or drag when an object moves through it. It acts in a direction opposite to the object’s motion. It is generated by the relative velocity between the solid object and the fluid.

Jul 21, 2022 · Drag is the aerodynamic force that opposes an aircraft’s motion through the air. Drag is generated by every part of the airplane (even the engines!). How is drag generated? Drag is a mechanical force. It is generated by the interaction and contact of a …

Definition: DRAG FORCE. Drag Force \(F_D\) is found to be proportional to the square of the speed of the object. Mathematically \[F_D\propto v^2 \] \[F_D = \dfrac{1}{2} C_{\rho} Av^2, \] where \(C\) is the drag coefficient \(A\) is the area of the object facing the fluid, and \(\rho\) is the density of the fluid.

When a solid body interacts with a fluid (liquid or gas), a drag force is produced on the solid body. Drag forces are not created by any force fields. In order to experience a drag force, an object has to come into physical contact with the fluid medium.

Mar 16, 2025 · Definition: Drag Force. Drag force \(F_D\) is proportional to the square of the speed of the object. Mathematically, \[F_{D} = \frac{1}{2} C \rho A v^{2},\] where \(C\) is the drag coefficient, \(A\) is the area of the object facing the fluid, and \(\rho\) is the density of the fluid.

Feb 17, 2025 · Drag, force exerted by a fluid stream on any obstacle in its path or felt by an object moving through a fluid. Its magnitude and how it may be reduced are important to designers of moving vehicles, ships, suspension bridges, cooling towers, and other structures.

Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in.

Drag force is resistance force caused by motion of body through fluid like water or air. This drag force acts opposite to the direction of oncoming flow velocity. Therefore, this is the relative velocity between the body and the fluid.

Feb 25, 2025 · DRAG: The Aerodynamic Force Resisting Motion. Drag is one of the four fundamental forces of flight and plays a crucial role in determining an aircraft’s performance. Unlike lift, which helps an aircraft ascend, or thrust, which propels it forward, drag opposes motion, resisting the forward movement of the aircraft through the air. ...