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There is a critical height for diving, which is generally around 80 feet, and meters. Of course, this also has something to do with the body parts that fall into the water. When too much is exceeded, a person falls to the surface of the water with a large impulse, almost the same as falling to the ground.
It means that the faster the fall, the greater the momentum in a moment, causing injury or loss of life.
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If it is too high, when you fall into the water, because the speed is too fast, the water surface will not have time to deform, and it will be the same as hitting the concrete floor, and there is no cushioning effect.
The larger the contact surface, the slower the shape change, and the greater the impact force, so the diver stabs straight down, rather than flat.
So it doesn't matter how much height you have, the main thing is speed and contact surface.
However, the water must be deep enough, otherwise it will hit the bottom of the water and cause more damage.
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That's an interesting question.
Correction: The impulse force you understand is called "energy" in physics, and the energy generated by the free fall motion of an object is called gravitational potential energy (related to weight and height, or related to falling speed and object gravity).
As long as the height is "correct" enough, the person will fall to his death.
The concrete floor has a strong supporting force (that is, you pat the ground and want to slap your hands into the ground, but the ground seems to give you an upward force, and you can't slap in).
According to the principle of equilibrium, almost 100% of the energy obtained by a person's free fall will be transmitted back to the human body.
Inflicts impact damage on the human body.
And when you shoot the water, do you feel that the water also gives you an upward support force, but this force is much smaller.
And a person has a certain speed (guaranteed to have a certain amount of energy) to hit the surface of the water, and part of the person's gravitational potential energy turns into a splash, and part of it is "pushed" back to the human body by the "supporting force" of the water.
Causing impact damage to the human body, but the damage will be much smaller than that of a concrete floor, but don't ignore this injury for a person. That's enough.
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The posture when entering the water is related.
When entering the water, the greater the contact surface with the water, the greater the impulse.
The critical height is related to the posture of entering the water.
It's not like cement, it's not like you can't fall to death.
If this is the case, try to enter the water with your feet down.
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This is related to both the height and the area of the water intake. The higher the height, the greater the speed of entering the water due to the gravitational acceleration, and the greater the impact on the human body; The smaller the area, the less resistance the water produces, the less the reaction force on the human body, and the smaller the impact force.
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The first is to look at the depth of the water and the distance between the jump point and the water surface, and then the smaller the cross-section when entering the water, the less damage you will suffer.
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The larger the contact area, the easier it is to die, and if you jump from a high enough place and shoot it horizontally, your internal organs will be shattered, or you can say that water is the softest and most rigid thing.
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If you have a large contact with the water, you are likely to fall to death, and if you are small, it is the opposite.
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If it's too high, it will.
Diving from a high-flying airplane has the same effect as jumping over a steel plate.
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It's about posture.
The area into the water is large and dead.
Little too high also died.
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It is not about the height, but the position of the person entering the water and the surface of contact with the water.
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Falling into the water from a height of 5,000 meters will kill. Falling into the water from a height of 5,000 meters is certain death. The unprotected limit diving without injury is recorded at a height of 34m, and the requirements for entering the water posture are extremely high, such as having to enter the water with both feet first, if the head or lying down horizontally, there is no third result.
In a free fall from a height of 5,000 meters, no matter how deep the water is, the higher it falls, the greater the acceleration. That's certain death, and as a reminder, falling into the water after a hundred meters has the same effect as falling on the concrete floor. So falling into the water from a height of 5000 meters will die.
Drowning mechanisms
The mechanism of drowning has not yet been conclusively elucidated. In the past, it was thought that the mechanism of drowning in freshwater was different from that of saltwater. In the case of freshwater drowning, a large amount of water is absorbed into the blood, which greatly dilutes the blood, increases the blood volume, increases the burden on the heart, and soon pulmonary edema, irregular heart rhythm, accelerated ventricular heart rhythm and develops into ventricular fibrillation, heart failure death.
Due to the high osmotic pressure, the seawater inhaled by the drowning victim in the alveoli not only does not enter the bloodstream, but on the contrary, it can suck water out of the capillaries of the alveolar wall, causing pulmonary edema, and the blood can be concentrated to a certain extent. As a result, people who drown in seawater often do not develop heart rhythm disorders, mainly due to hemoconcentration, increased viscosity, and finally death due to heart and respiratory failure.
However, it is believed that the transport of water or electrolytes is very small, regardless of whether it is a freshwater drowning or a seawater drowning, so the change in blood volume is not obvious and does not constitute the above change and cause death. Experiments have repeatedly proven that drowning is inhaled into the respiratory tract and alveoli, hinders respiratory movements, affects gas exchange, leads to a lack of oxygen in the body and retention of carbon dioxide, a decrease in the partial pressure of oxygen, an increase in the partial pressure of carbon dioxide, and hypercapnia.
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Summary. Hello, if you don't die, you're dying.
Hello, if you don't die, you're dying.
Jumping from a height of 100 meters can be said to be quite powerful, just like jumping from the top of a 30-meter building, it can be said to be deadly.
Research has proved that when a person falls from a height of 100 meters, the final speed of entering the water is 159 kilometers per hour, and at this speed, it can be said that the chance of survival is almost 0, as for ordinary people like Cheongzhou, it is difficult to survive if they are more than 30 meters.
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The official record for world diving should be 59 meters. Ordinary people at 30 meters have no chance of surviving at all. If they have to dive, they must use a soldier's standing position.
If you fall into the water for about 10 meters in a dorfang-headed position, you will also bear a load of 60 g, resulting in death or disability. So there's not much to do, so the chances of diving are slim. It also shows that because of various situations in the TV series and **, it is impossible for the bottomless waterfall to be alive.
The depth of the water should be at least a third of the jump. I saw it in a survival book, which book I forgot, but what is more important is the posture, the toes hanging straight into the water, if I have to use large print. If you get into the water, you can't run away with sternum fracture + lung injury. Be lucky.
According to the corresponding interpretation of engineering fluid mechanics, because the fluid cannot maintain a certain shape, it can only resist the pressure but not the tensile force, and the static fluid cannot resist the shear stress. When it is subjected to shear forces, continuous deformation or flow occurs. Therefore, if you shoot flat, the water can withstand the pressure, and if you shoot vertically, it is basically fine in theory, but in practice it still looks dangerous due to the influence of viscosity.
Of course, this is also the reason why divers need to put their hands in the water first when diving. However, since the human body cannot make needles after all, falling from a particularly high place will be affected by pressure.
From the perspective of the individual, the damage to people is reduced to the "survivable height after the fall". The landlord gave an example, such as a cat. Based on my understanding of cats, cats can be observed jumping down from a height, landing on their front paws first, body inertia and then their hind feet.
At the same time, I also thought of 10-meter divers, who touch the water with their hands first when falling into the water (of course, falling into the water is much less harmful than falling to the ground). Along these lines, I think one of the best injuries reduction poses is to touch the ground with your hands, then bend your body and roll your head forward, which can cushion and reduce the pressure of falling. This is mainly to reduce the damage by controlling one's body.
Personally, I find it difficult to do.
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If you are not a professional diver, ordinary people may not survive by jumping 30 meters, and diving is a very dangerous sport.
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Hundreds of meters, because jumping from such a high place has too much impact, it will lead to death.
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More than 20 meters. Jump down because of this height. The impact was just too great. It can damage the organs of the body.
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In 2012, FINA officially announced that Shenzhou high platform jumping was listed as an official event of the 15th Barcelona Swimming Championships in 2013.
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First of all, if Gao Lao rents and falls into the water, you have to look at the high service base, if the height and water depth are relatively appropriate, then you can still lose your life, well, at the same time, we do not recommend that you fall directly into the water from a high altitude, because the pressure of the installation is also very hurt. Therefore, if it is normal, it is necessary to make a comparison between the high cavity and the water according to a scientific standard.
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If the impulse is too large, it doesn't have to be.
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