Average human freefall speed full#

This is only one-third or so of the terminal velocity. The speed of a diver from a 30 metre cliff is estimated to be only about 90 km per hour. How long does it take on average for a human body accelerate to 78 mph in freefall Convert 78 mph to meters per second: 78 mph35 meters/second The acceleration of earths gravity is 9.8. The danger of the event was emphasised by the fact that the 'live' broadcast had a built-in delay, allowing the public to be spared a gruesome spectacle in the event of tragedy.Īfter the long tension-building ascent, Felix could be heard running through the checklist with Col Kittinger and telling of the unexpected fogging of his visor. of a typical person, they would most likely say weight by which they actually mean mass (more on this later). Although there is some dispute about this figure, the terminal velocity of a human is estimated to be about 325 km per hour. The helium-filled balloon took Felix on his two-hour journey into the stratosphere.

They're falling towards Earth, but their speedup to 25 times the speed of soundmeans that the planet is falling away from them just as fast.

Average human freefall speed full#

This was enough helium for lift off, but did not fill the balloon envelope to capacity because they needed to leave space to allow the helium to expand while the balloon rose.Īs the air pressure decreased with the balloon's rising altitude, the helium inside it expanded, eventually filling the entire envelope to its full capacity of approximately 850,000 m³ (30 million ft³) at jump altitude. It's just that they're in a constant free fall.

The balloon had around 5,097 m³ (180,000 cu ft) of helium inserted by the crew prior to its launch. A giant balloon, as tall as the Statue of Liberty when fully inflated and with a capacity of approximately 850,000 m³ (30 million cu ft), carried Felix inside a capsule to an altitude of 38,969.4 m (127,852 ft).