Terminal velocity
highest velocity attainable by an object as it falls through a fluid / From Wikipedia, the free encyclopedia
Terminal velocity is the speed when an object falling through a fluid (usually air) is no longer getting faster.
Terminal velocity happens at the moment in time that the force of gravity, called weight, is the same as the opposite force of air resistance or friction. In other words, terminal velocity is the point at which the velocity (speed of moving of the falling object) is no longer getting greater. The gravitational force minus the force of drag (or air resistance) equals zero.[1]
An object continues to fall steadily until air resistance becomes so great that it equals the pull of gravity and the object can fall no faster. Besides weight, terminal velocity depends on other factors such as shape and cross sectional area.