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In fluid dynamics, drag (sometimes called air resistance or fluid resistance) refers to forces that oppose the relative motion of an object through a fluid (a liquid or gas).

Drag forces act in a direction opposite to the oncoming flow velocity.[1] Unlike other resistive forces such as dry friction, which is nearly independent of velocity, drag forces depend on velocity.[2]

For a solid object moving through a fluid, the drag is the component of the net aerodynamic orhydrodynamic force acting opposite to the direction of the movement. The component perpendicular to this direction is considered lift. Therefore drag opposes the motion of the object, and in a powered vehicle it is overcome by thrust.

In astrodynamics, and depending on the situation, atmospheric drag can be regarded as an inefficiency requiring expense of additional energy during launch of the space object or as a bonus simplifying return from orbit.

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Does air resistance depends on the density of the object?

No it just depends on the size and shape of the object. An obect is more affected by air resistance if it is lighter.


Does air temperature affect air resistance?

There are two factors that influence air resistance with temperature. Air density decreases with temperature so that the force needed to push the air out of the way is decreased, thereby decreasing resistance. Conversely, air viscosity increases with temperature (unlike oil for example where viscosity decreases with temperature) so that the drag increases. Under normal conditions, the density change of air has the greatest effect and air resistance decreases at higher temperatures.


Does air resistance occur when the wind is blowing?

Yes, air resistance still occurs when the wind is blowing. The speed and direction of the wind will affect the amount of air resistance experienced by objects moving through the air.


Does air resistance increase or decrease the acceleration of a falling leaf from a tree?

Air resistance decreases the acceleration of a falling leaf from a tree. As the leaf falls, air resistance opposes its motion, slowing it down. This results in a lower acceleration compared to if the leaf were falling in a vacuum with no air resistance.


How does air resistance affect the acceleration of falling objects?

As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying to limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum.

Related Questions

Explain why air resistance is larger when the car is traveling faster?

Bikes cars and other moving objects experience air resistance as they move.Air resistance is caused by the frictional forces of the air against the vehicle. The faster the vehicle moves the bigger the air resistance becomes.


Explain how a parachute works using the terms air resistance surface area and gravity?

A parachute works as the gravity allows the parachute to go up into the air, then the surface area is covered with air resistance.


Explain how streamling helps reduce air resistance?

Streamlining reduces air resistance by shaping an object so that air flows smoothly around it with minimal disruption. This reduces the creation of turbulent air flow patterns that can create drag on the object. Smooth, streamlined shapes help minimize the resistance encountered as the object moves through the air.


Explain why a man using a parachute falls through air slowly while a stone falls through air very fast?

When an object falls through air, it experiences air resistance. This air resistance is a force that opposes the object's motion. The amount of air resistance an object experiences depends on the object's shape, size, and speed. A man using a parachute falls slowly because the parachute creates a large amount of air resistance. A stone falls very fast because it has a small amount of air resistance.


What is air resistance and what are the two factors that air resistance depends on?

Air resistance is the force that opposes the motion of an object through the air. It depends on the speed of the object and its surface area exposed to the air.


What force slows objects moving through the air?

Air resistance


Why does the oscillation of a pendulum gradually slows down after a certain interval of time?

Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.


When an object falls through the air encounters air resistance its overall speed will be than if it had not encountered air resistance?

The resistance do obstruct the object. The object always travel slower with air resistance. Air resistance is higher with velocity and the object falling through air would have a limited velocity that it can't go through.


How does surface area affect air resistance?

air resistance affects


Explain how streamlining helps reduce air resistance?

Streamlining reduces air resistance by shaping the object or body in a way that allows air to flow smoothly around it, reducing turbulence. By minimizing disruptions to the air flow, streamlining helps to decrease drag force, enabling the object to move through the air more efficiently with less energy required.


What are the different types of resistance available on exercise bikes?

The different types of resistance available on exercise bikes are magnetic resistance, air resistance, and friction resistance. Magnetic resistance uses magnets to create resistance, air resistance uses air to create resistance, and friction resistance uses a brake pad to create resistance.


How are air resistance and friction alike?

Air resistance is a type of fluid friction (along with water resistance) and is therefore is a type of friction.