Originally posted by: BroeBo
That must be a pretty intense jump. I would do it. I wonder whats the highest "safe" jumping distance...
Diving
The following table summarizes velocity of impact, and time-in-the-air, from the various standard heights of 1 m, 3 m, 5 m, and 10 m, that are found in municipal swimming baths, as well as from greater heights. The impact velocity and time of impact vary as the square root of the height. Heights beyond 10 m are not commonly found at municipal swimming baths, but exist at "use at your own risk" places such as bridges and cliffs. Cliff jumping, a common pastime for daredevil children, often takes place at heights of 20 m to 30 m. There is a limit to how high one can jump from and survive, regardless of water depth. For example, the Golden Gate Bridge is 220 feet (66 m) high and overlooks water deep enough to not hit the bottom, but the result is (almost) certain death. Thus the 66 m jump listed below is only used for suicide, but the other heights are typical of recreational bathing. Although 66 m is a "lethal dose", children often jump from 30 m (approximately 50% lethal dose) for recreation. This can be quite dangerous (e.g. if landing badly, or hitting a branch or dead fish or other object floating on the surface). The impact can also knock him unconscious, and, in absence of lifeguards (i.e. bridge jumping or cliff jumping), can cause drowning, even if from less than the lethal height. There have been documented accounts of people walking away from dives as high as 54 m, as well as the occasional Golden Gate Bridge survivor.
One should note that in heights above 30 m, there is little additional time in the air, yet the velocity upon impact increases considerably. Thus, diving from heights above 30 m offers no advantage for acrobatics or thrill-seeking, but instead greatly increases the risk of injury.