Drag Force Formula

Drag Force Formula

In a common sense setting, drag force is the force applied to a solid body moving in relation to a fluid as a result of the fluid’s motion. Take the drag of a ship going through the water or the drag of a plane flying through the air. Consequently, a drag force is the resistance force brought on by a body moving through a fluid like air or water. In opposition to the direction of the incoming flow velocity, this drag force operates. Consequently, this is the fluid’s and the body’s relative velocity. Students will learn about the idea and the Drag Force Formula in this article using examples. Let’s study the idea!

The force that opposes the motion of a body carrying fluid is known as the drag force (D). Aerodynamic drag is the term for when a body’s motion occurs in fluid-like air. Also known as a hydrodynamic drag if the fluid is water. Whenever a drag force is present, it always works against fluid flow.

In this article, students will discover the Drag Force Formula. The Drag Force Formula in an equation can be found using the Drag Force Formula. A model’s ability to accurately represent the underlying data is also measured using the Drag Force Formula. Let’s learn these in the next sections, along with a few solved situations, for a better understanding.

Drag Force Formula

The resisting force of fluid is known as Drag Force Formula. This force is present and works in the opposite direction to the motion of the submerged object. As a result, drag force is defined as the force that opposes a body’s motion through a fluid.

Aerodynamic drag is the motion of the body when it is in a fluid-like environment like the air. Additionally, if the fluid is water, the drag is hydrodynamic. Its nature is to behave differently from the velocity flow.

The maximum terminal speed that a falling body can reach is always constrained by air resistance. The drag force, which is the force that objects experience when they move through a fluid, is exemplified here by air resistance.

Drag Force Formula is reactive in nature, similar to kinetic friction in that it only occurs when an object is moving and points in the opposite direction to the direction of the object’s motion in the fluid.

Form drag and skin drag are two categories into which this force can be divided. Form drag is brought on by a fluid’s reluctance to be pushed aside by an object moving through it.

As a result, form drag is comparable to the normal force generated by solids’ resistance to deformation. Skin drag is essentially a kinetic frictional force brought on by the fluid sliding over the moving object’s surface.

Concept of Drag Force

Everywhere students look, there is the drag force. In a ball of fluids (air and water), we survive. Any time there is motion in a fluid, such as air, water, or another one, drag forces become present.

The Drag Force Formula calculates the resistive forces that exist when objects move through fluids (a gas or a liquid).

The Drag Force Formula is always acting in opposition to fluid flow. Aerodynamic drag is the motion of the body in the fluid-like air. Additionally, it is known as a hydrodynamic drag if the fluid is water.

The formula for Drag Force


Drag Force Formula= (Fluiddensity)×(Squareofthevelocity)×(Dragcoefficient)×(Cross−sectionarea)

Therefore, mathematically,


D Drag Force

Cd It is the drag coefficient

ρ It is the density of the medium in kgm−3

V It is the velocity of the body in ms−1

A It is the cross-sectional area in m²

Solved Examples on Drag Force Formula

What do you understand by Hydrodynamic drag?

Hydrodynamic drag is the term for a body’s motion through a fluid-like medium like water.

What factors affect Drag Force Formula?

Drag is dependent on several factors, including the size and shape of the body, compressibility, air density, and viscosity.

What kind of force—contact or non-contact—is drag?

No force field can produce drag forces. The object needs to physically touch the fluid medium in order to feel the drag force.

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