Terminal velocity

In physics, terminal velocity is the velocity at which the drag force of a falling object equals the weight of the object minus the acting force due to air, which halts acceleration and causes speed to remain constant. As an object accelerates (usually downward due to gravity), the drag produced by the passing through a fluid medium, (usually air), increases. At a particular speed, the drag force produced will be equal to the downward force, mostly the weight (mg), of the object. Eventually, it plummets at a constant speed called terminal velocity. Terminal velocity varies directly with the ratio of drag to mass. More drag means a lower terminal velocity, while increased mass means a higher terminal velocity. An object moving downwards at greater than terminal velocity (for example because it was affected by a force downward or it fell from a thinner part of the atmosphere or it changed shape) will slow until it reaches terminal velocity.
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Terminal velocity may refer to the following: Terminal velocity, (a) the final speed (usually an impact speed) achieved by an object at the end of its path (where gravity, applied physical acceleration and dragging effects may all play a part), and (b) in skydiving, the maximum speed achievable for a given object's atmospheric freefall, at which deceleration due to atmospheric friction counteracts further acceleration due to gravity, and no further acceleration occurs - this is now the more common usage.Terminal Velocity (film), a 1994 film starring Charlie Sheen.Terminal Velocity (video game), a 3D action game published by 3D Realms in 1995, but unrelated to the movie of the same name.Terminal Velocity (novel), a novel by Blanche McCrary Boyd.
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Noun
1. the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity
(hypernym) speed, velocity

1. Hypothetical maximum speed a body could attain along a specified flight path under given conditions of weight and thrust if diving through an unlimited distance in air of specified uniform density. 2. Remaining speed of a projectile at the point in its downward path where it is level with the muzzle of the weapon. 1/11/68

Vitesse maximale théorique qu'un corps atteindrait sur une trajectoire déterminée, dans des conditions données de poids et de poussée, s'il poursuivait sa chute indéfiniment dans une atmosphère de densité uniforme. 1/11/68

Vitesse restante d'un projectile au point de sa trajectoire situé à la même altitude que le point de lancement. 1/11/68