![]() ![]() An acceleration of just 16 g's for an extended time period can be deadly also. It seems that the duration of the acceleration is quite important. However, it also says that some people may have survived accelerations up to 100 g's. Wikipedia's g-force tolerance page lists 50 g's as "likely death". Then what kind of accelerations can a human body withstand? In a previous episode of Mythbusters - the jumping from a building with bubble wrap one, they state that stunt men aim for a maximum acceleration of 10 g's. But wouldn't that be cool? If there was some force field that could stop you (or shoot you off like a bullet) without causing damage? Yes. The only force that pulls on all parts of a body would be the gravitational force (since all the parts have mass). No inner spring compression means no body damage. What if there was some long range force to accelerate this two-ball model of a body? If this same force was on both balls in the model, you could get a super high acceleration without having to compress the inner spring. ![]() So, large accelerations can cause damage. This is where the damage comes into play. This not only prevents us from passing out, but increases our peripheral vision, which is critical during a dogfight. Through a combination of special breathing and tensing our lower body we can squeeze the blood back into our head. If this spring is compressed too much, it could break. The first step in combating G’s is the Anti-G Straining Maneuver (AGSM). The greater the acceleration, the greater this spring force must be and the more compressed the inner spring will be. This means that the force the inner spring exerts on the top ball must be greater than the gravitational force. ![]() Since it has to accelerate up, it must have a net force pointing upwards. If the body falls and collides with the ground, it must accelerate in the upward direction. In this model, there are two balls connected by a spring. ![]()
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