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A redout occurs when the body experiences a negative g-force sufficient to cause a blood flow from the lower parts of the body to the head. It is the inverse effect of a greyout, where blood flows away from the head to the lower parts of the body. Usually, a redout will only ever be experienced by pilots, as planes are the most common devices ...
The g-force or gravitational force equivalent is a mass-specific force ... In the same way, a negative-g force is an acceleration vector downward ...
g-force induced loss of consciousness (abbreviated as G-LOC, pronounced "JEE-lock") is a term generally used in aerospace physiology to describe a loss of consciousness occurring from excessive and sustained g-forces draining blood away from the brain causing cerebral hypoxia.
In Newtonian physics, the sensation of weightlessness experienced by astronauts is not the result of there being zero gravitational acceleration (as seen from the Earth), but of there being no g-force that an astronaut can feel because of the free-fall condition, and also there being zero difference between the acceleration of the spacecraft ...
Zero-G (where the net vertical G-force is 0) is achieved when the downward acceleration of the train is equal to that due to gravity; where the downward acceleration is greater, negative Gs arise. [citation needed] The zero-gravity roll is a roll specifically designed to create the effect of weightlessness and thereby produce air time.
This is the reverse of a redout, or a reddening of the vision, which is the result of negative g-forces caused by performing an outside loop, that is by pushing the nose of the aircraft down. Redouts are potentially dangerous and can cause retinal damage and hemorrhagic stroke .
A negative balance on a credit card is typically a positive sign, indicating that the consumer has overpaid for something or received a statement credit. Negative balances can result from refunds ...
Air time (rides), also spelled "airtime", negative g-force producing a sensation of weightlessness in amusement rides Air time (parachuting) , also spelled "airtime", time before the parachute opens in skydiving