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Air friction, or air drag, is an example of fluid friction. Unlike the standard model of surface friction, such friction forces are velocity dependent. The velocity dependence may be very complicated, and only special cases can be treated analytically.
4 Μαρ 2017 · The forces that a moving vehicle must overcome are the tire rolling resistance, the driveline friction, elevation, vehicle acceleration changes, and also aerodynamics. Let us assume that the vehicle moves along a flat surface at a constant speed and the external forces are limited to the tire friction and to the aerodynamic drag.
20 Οκτ 2022 · It’s the study of how air flows around a car and how that affects its performance. There are two types of airflow: laminar and turbulent. Laminar airflow is smooth and predictable, while turbulent airflow is chaotic and unpredictable. Laminar vs Turbulent flow.
Aerodynamic drag, sometimes called wind resistance, is an effect which a vehicle must overcome more and more as speed increases. Drag is a form of friction, though some of the air's effect on the vehicle is due to a low pressure zone behind the vehicle, and a high pressure zone in front.
10 Μαΐ 2012 · In other words, as a car speeds up, it experiences more ‘drag’, or air resistance, pulling it backwards. This phenomenon causes a limit on the speed of a falling object, called the ‘terminal velocity’.
If two systems are in contact and stationary relative to one another, then the friction between them is called static friction. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction.
The optimal aerodynamic shape, which has the lower drag coefficient is the shape of a water drop (Cd = 0.04). Due to the air friction, the water drop is forced to take the shape which has lowest resistance in contact with the air, hence it has the lowest drag coefficient.
