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Parachuting has developed a lot in the last century.
A new, very beautiful sport was created as part of parachuting and
it is called skydiving. In skydiving groups of 4,8,16,32 or even more
people jump simultaneously and form various forms in the sky. To fly
faster skydivers wear special tight suits to decrease the drag. In
order to reach each other the jumpers change their speed by assuming
different body shapes.
In skydiving there are no additional sources of energy except for
gravity. So the only way to increase your speed is by by reducing
the drag. This is done by assuming a certain pose and wearing smooth
tight suits. There is one more factor affecting the fall speed - the
air density , but it is usually not considereded much.
| Altitude - (meters) |
Atmoshere (pressure) - (in.Hg) |
| 0 |
29.92 (100%) |
| 1500 |
24.83 (83%) |
| 2400 |
22.44 (75%) |
| 4500 |
16.87 (56.4%) |
| 5400 |
14.96 (50%) |
Before deploying his parachute the jumper can reach about 190km/h.
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