What is the most g-force that a human can resist?
How much G-force the human body feel damage?
How much G-force the human die?…
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6 ANSWERS

Vincent Maldia
Written Jun 27, 2015
It depends on
1. what position/direction

2. with or without training

3. duration

4. How much of the body is exposed

5. positive or negative G

" A hard slap on the face may briefly impose hundreds of g locally but not produce any real damage; a constant 16 g for a minute, however, may be deadly"

"A typical person can handle about 5G (49 m/s2) (meaning some people might pass out when riding a higher-g roller coaster, which in some cases exceeds this point) before losing consciousness, but through the combination of special g-suits and efforts to strain muscles—both of which act to force blood back into the brain—modern pilots can typically handle a sustained 9G"

"Resistance to "negative" or "downward" g, which drives blood to the head, is much lower. This limit is typically in the −2 to −3 g0 (−20 to −29 m/s2) range."

"In general when the acceleration is forwards (subject essentially lying on their back, colloquially known as "eyeballs in"[14]) a much higher tolerance is shown than when the acceleration is backwards (lying on their front, "eyeballs out") since blood vessels in the retina appear more sensitive in the latter direction"

"untrained humans were able to tolerate a range of accelerations depending on the time of exposure. This ranged from as much as 20 g for less than 10 seconds, to 10 g for 1 minute, and 6 g for 10 minutes for both eyeballs in and out."

"The record for peak experimental horizontal g-force tolerance is held by acceleration pioneer John Stapp, in a series of rocket sled deceleration experiments culminating in a late 1954 test in which he was clocked in a little over a second from a land speed of Mach 0.9. He survived a peak "eyeballs-out" force of 46.2 times the force of gravity, and more than 25 g for 1.1 seconds, proving that the human body is capable of this."

g-force

"Major John Beeding, an Air Force volunteer, endured a whopping 83g (albeit for .04 seconds) during the sled’s nearly instantaneous stop. He too walked away from the experiments none the worse for wear.
…
The human body can tolerate violent accelerations for short periods, including the prolonged high-g acceleration necessary to reach Earth orbit. However very prolonged periods of high-g acceleration during travel between planets would be very harmful to the body, and therefore out of the question."

Why the Human Body Can’t Handle Heavy Acceleration

" Experts estimate that, in the car accident that killed her, the G forces on her chest were about 70 G’s (and 100 G’s on her head). That acceleration was enough to tear the pulmonary artery in her heart, an injury almost impossible to survive. If Diana had been wearing a seatbelt, the G forces would have been in the neighborhood of 35 G’s, and she may have lived.
…

the average sneeze creates G forces of 2.9, a slap on the back 4.1, and a plop down into a chair 10.1. If you jump from three feet up and land stiff-legged, write the authors of the book Physics of the Body, you’ll feel about 100 G’s momentarily"

http://www.pbs.org/wgbh/nova/spa...
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Steve Waddington, Network Engineer, CIO and CEO. Current Gemologist
Updated Jun 27, 2015
Rocket sled tests have shown that humans can withstand very high G-forces if they are properly restrained and the force is spread out evenly. In a car crash, a passenger may experience as much as 50G deceleration, and, if secured by a seatbelt could come away with only superficial injuries.

At 75G deceleration, the expected fatality rate is 50%. Deceleration over 80G is considered always fatal.
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Steve Schafer, Coder, part-time physicist, birder
Written Jun 27, 2015
There isn’t a single answer, because it depends a lot on the circumstances. When a person decelerates suddenly, the different parts of the body will generally not all decelerate at the same rate.

Many people have endured 100g accelarations during automobile crashes, but that level of acceleration applied to the head would cause a serious concussion injury.
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George Gonzalez, Four semesters of Physics! Passed all of them!
Written Mar 16, 2015
it depends on what direction. If you are standing up you can only tolerate like 4 G before the blood drains from your head and you pass out. Lying down you can tolerate a few more, and with a pressure leggings pressing on your legs and abdomen and with you pressing down and grunting you can tolerate like 8G’s.
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Dennis Kitainik, works at Self-Employment
Written Mar 16, 2015
Pilots who flew dive-bombers during World War 2 (the German Stuka, the Russian Pe-2 and our SBD Dauntless) had to endure up to 11-12 G when pulling out of the dive — so the human body could survive at least that many (although with brief blackouts).
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Alex Parsky, studied at University of Maryland, College Park
Written Sep 24
Originally Answered: What is the most lethal G force a person can handle? Why?
Pretty sure it’s around 5gs of gravity because your heart can’t pump blood effectively if you add nor force on it.
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