How does weightlessness feel? What is weightlessness?

In life, overweight and weightlessness are very common, for example, when people are in the elevator, when the elevator accelerates up, they feel that the pressure on the soles of the feet of the elevator increases, which is the phenomenon of overweight.

Hypofunction of the heart and blood circulatory system in weightlessness is of particular interest. When the object is weightless, the blood and other bodily fluids in the body rush to the head and chest, which is 2 liters more than when on the ground, and the astronaut's head and neck are visibly swollen.

A person is weightless while flying in space. The first problem that arises in weightlessness is space motion sickness, which occurs in one out of every two astronauts, manifesting as paleness, cold sweats, vomiting, and seasickness.

I'm in an elevator, and the elevator has gravity and a strong force to make it go down, because it has a lot of force, and you only have gravity, it moves faster than you, so that if the descent distance is infinite, it feels like it's in the air, and there is no gravity.

Due to gravity, on the ground, the balls made with modern technology are not absolutely spherical, which is one of the important reasons for the wear of the bearings, if in the spacecraft can be made of absolutely spherical balls, and the astronaut in the spacecraft due to complete weightlessness, so his diet, life methods must be very different from the ground.

Strapped to a few hydrogen balloons, your pressure on the ground is not reduced. And the magnitude of your gravity hasn't changed. Therefore, it is possible to "feel" the decrease or disappearance of gravity without decreasing.

The red blood cells in the astronaut's blood will decrease by 15%, and this reduction will peak for about 40 days, and then subside, and return to normal in 3 months, so this change is also an adaptation to space. But there is another category that does not fall under the category of adaptation, the most dangerous of which is the reduction of calcium in the body.

The heart's stroke volume also increases, and fatigue is excessive, and heart failure soon occurs. But it is also believed that the heart will shrink by 10% in size due to the blood rushing to the upper part and will not recover until it reaches the ground a year.

Reduce the pressure on the bridge, the bridge generally causes a convex type, so that the car crosses the bridge with a downward acceleration and the pressure on the bridge is reduced, when the car passes through the concave road surface, due to the vertical upward acceleration and the phenomenon of overweight, often make the car tires burst due to the pressure.

To put it simply, when the force is balanced, it may appear weightless; After careful analysis, it was found that simply balancing the force does not make you weightless.

That is, staying at home for a long time, being isolated from the outside world, not knowing about the outside world, so there is a sense of weightlessness, the meaning of an abnormal house, hope.

1. Feeling of weightlessness: the body floats, resulting in dizziness, nausea, vomiting and other symptoms.

2. In the case of weightlessness, the otoliths in the vestibular organs of the human vestibular organs no longer contact with the surrounding nerve cells and transmit signals to the central nervous system, thus losing the orientation function. The vestibular organ is closely related to the autonomic nervous system, which is responsible for respiration, digestion, circulation, excretion, sweating and other functions. Therefore, once the vestibular organs do not function and the normal interaction between the internal organs of the body disappears, it will cause the space pilot to develop symptoms such as dizziness, nausea, vomiting, etc.

3. A state in which an object moves freely in a gravitational field without showing weight or small weight, also known as zero gravity. Weightlessness is sometimes referred to in terms of zero-gravity and microgravity environments. To be precise, it is weightless when the acceleration is straight downward.

The phenomenon of weightlessness occurs mainly in orbit or in space or in some other abnormal conditions (far from a planet or a heavy object).

4. Humans who have been accustomed to gravity will have the feeling of not being able to find up and down in a weightless environment. Roller coasters are just subjected to centrifugal force, and the feeling of weightlessness is different.

How to overcome the feeling of fear of weightlessness is explained as follows:

Overcoming weightlessness is mainly to overcome psychological fear, as long as the psychology accepts it, it is not afraid. When ordinary people are weightless, the interaction between organs and body fluids disappears, which will have a great impact on the normal functioning of the human body, resulting in physical discomfort, such as dizziness, nausea and so on. Weightlessness is a reaction of the brain to changes in the body's senses, and it is an illusion that can be eliminated through practice.

Try to empty your lungs as much as possible during the fall, stick your head back tightly against the safety device or chair, imagine yourself becoming one with the machine, relax, divert your attention, and yell out loud, with your mouth open and your voice to help relieve the effects of weightlessness.

How to overcome fear of heights with exercise:

1. Several elements that control the balance of our human body: inner ear, vision and intramuscular, these elements must be carried out through activities to function normally, such as office workers who sit at the computer all day long, and only get up for a long time to pour a glass of water, and their eyes are staring at the computer screen.

2. Participate in more physical exercises, not only can reduce pressure, but also fitness, people with fear of heights can do more high-pitched exercises, such as rock climbing, etc., can also carry out some relatively simple exercises, such as walking single-plank bridges, jumping, turning circles, etc., to make the body's balance better, so that the symptoms of fear of heights have improved.

Do the following and you will slowly overcome your fear of heights:

1. Stand in a place where you can arouse fear, at least 30 minutes, and stand slowly.

2. When you first start to do overcoming exercises, don't put yourself in a very high place, which will only make your fear of heights worse, you can start with the easy place that will not make you feel great fear in your heart.

3. Overcoming fear of heights does not mean that you can be completely unafraid of heights by doing it once or twice, during which you should continue to exercise, and it is best to do it regularly and in an arranged manner.

4. When doing overcoming exercises, you have to concentrate and don't think about other things, if you are distracted, your inner fear will also be lower, but the relative effect is not so good.

The most important thing to overcome fear of heights is for patients to constantly overcome their own psychology and constantly strengthen their motor ability to improve.

You say ask questions.

I was in a car recently, and the car was not very good, but I felt very panicked in the car, like the feeling of falling from the sky.

Also, the car is driving fast.

It's not a big deal.

I also have psychological cues to encourage myself to give myself more positive psychological cues, believe that I can, if I feel a sense of weightlessness, you can yell out, mouth opening and voice shouting is conducive to relieving the body from the effects of weightlessness.

Asking questions will make you feel weightless.

Diverting AttentionIf you feel weightless at some point, imagine yourself becoming one with the machine and relaxing.

This situation can only divert attention, or it may be much better to be close to my back, and the way I overcome it is to overcome....As soon as I got in the car, I went to sleep....