How do people react when they lose weight? What it s like to be weightless

It feels light and fluttery, and there is no pressure on the ground.

For example, when a person is in an elevator, when the elevator accelerates up, he feels that the pressure on the soles of the feet of the elevator floor increases.

Gravity is a component of the Earth's gravitational pull (almost equal in magnitude) to an object. The magnitude of the gravitational force is directly proportional to the mass and inversely proportional to the square of the distance. In the case of a celestial body with a certain mass, the farther away an object is from it, the smaller its gravitational pull is, i.e., the smaller the gravitational force, and at a sufficient distance, its gravitational pull is negligible.

The so-called weightlessness means that the gravity is zero, that is, zero gravity. The so-called gravitational force is the gravitational pull of celestial bodies on objects. The magnitude of the gravitational force is directly proportional to the mass and inversely proportional to the square of the distance.

In the case of a celestial body with a certain mass, the farther away an object is from it, the smaller its gravitational pull is, i.e., the smaller the gravitational force, and at a sufficient distance, its gravitational pull is negligible. But there is more than one celestial body in the universe, and the gravitational pull of many celestial bodies forms a gravitational field. Therefore, space will not be a weightless environment.

Of course, in local areas, such as in the Earth-January system, only the gravitational pull of the Earth and the Moon is considered, and at certain points between the Earth and the Moon, the gravitational pull of the Earth and the Moon cancels each other out, and the gravitational force is zero. There is also a gravitational equilibrium point between the sun and the earth.

Physiological causes of weightlessness:

People live in a gravity-driven environment on the ground for a long time, and once they enter a weightless environment, they will feel that their living habits are not adaptable. To this end, various measures must be taken for the life of astronauts: design tight-fitting clothing for astronauts, because fat clothes will float; Secure the contents of the cockpit to avoid free floating;

The broken food pieces or the particles falling from the surface will fly up and drill into the astronauts' eyes, noses, and even inhale the trachea, causing life danger, so the aerospace food should be made into blocks, one bite at a time; When drinking water, use a tube to pass into the mouth to prevent water droplets from entering the trachea;

Wash and splash water must be blotted dry with a water absorber to prevent water droplets from accumulating in the air and causing harm; Astronauts must tie themselves up with a strap or sleeping bag when sleeping; When walking in weightlessness, astronauts must wear shoes with hooks that can be attached to the grid-like floor (ceiling).

The above content refers to Encyclopedia - Weightlessness Physiology.

Encyclopedia - Weightlessness.

On Earth, everything we have is subject to the gravitational pull of the Earth.

In our daily lives, we walk on the ground with our feet, so why don't we walk with our feet up? The reason is that we humans are affected by gravity. Gravity was used by scientists in the 17th century.

It has been discovered that gravity has a very obvious effect on our daily lives. <>

So some people ask, what would it be like if we didn't have gravity? In fact, as intelligent human beings, our perception of gravity is very obvious. In everyday life, weightlessness is most noticeable.

When taking the elevator, we can clearly feel the feeling of weightlessness at the moment when the elevator goes up sharply. It's like there's a force that lifts you up, and you feel your body fluttering, and that's what weightlessness feels like. We live in gravity for a long time, but if there is no gravity, how would our body react?

What will become of our lives? <>

Without gravity, all aspects of human bodily functions would change. Without gravity, all the organs in our body will float upward, and at this time, we will obviously feel our organs moving around in our body at will, which will make us feel uncomfortable. If we live in weightlessness for a long time, our blood will continue to flow to the top of our limbs, which will cause the rest of our body to not have enough blood supply, which may lead to necrosis of the limbs.

Outer spaceis to live in weightlessness. This long-term weightlessness will put the life safety of astronauts at great risk. In outer space, human muscles lose their function, and in the long run, muscles atrophy without exercise.

Although the muscles are atrophied.

It will not affect the life of astronauts in space, but it will greatly affect the life of astronauts on Earth. In addition, in the case of weightlessness, our human bones will also change, and the calcium content in the bones will gradually decrease, which will cause bone degeneration. That's why astronauts need to sit in chairs for others to carry after they get out of the capsule.

In a weightless environment, people feel that the whole person will be fluttering, the heartbeat will suddenly increase, and ordinary people will suddenly panic, swing their limbs and struggle desperately at will, and they will gradually calm down after adapting to it for a period of time.

When you are weightless, you can feel light and fluttering, as if the whole person is not good. Dizzy and dizzy, like heat stroke, this is really about to die.

People on Earth are affected by the gravitational pull of the earth, so weightlessness is rare. Generally, when racing cars, the speed is too fast. Occasionally, there will be a feeling of 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.

In order to reduce the pressure on the bridge, the bridge generally causes a convex shape, so that the car has a downward acceleration when crossing the bridge and the pressure on the bridge is reduced, when the car passes through the sunken road surface, due to the vertical upward acceleration and the phenomenon of overweight, often make the car tire burst due to the high pressure.

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. Overweight and weightlessness are two opposite concepts, so I'll explain them to you together.

There is an object that we assume to have a mass of mNow, this object is moving vertically upwards (i.e., in the direction of leaving the Earth) with acceleration a. Obviously, because of this motion, the pressure n on the horizontal support surface (or the tension t on the vertical hanging line) is greater than the weight of the object itself, which should be equal to m(g+a).

This phenomenon is called overweight. We often say that the object is overweight

Similarly, now, if the object moves vertically downward (i.e., in the direction of the Earth) with acceleration a, the pressure n (or tension t) described above is less than the weight of the object itself, which should be equal to m(g-a).This phenomenon is called weightlessness. We often say that the object is weightless

If a = g, then the object is in fact in free fall, the pressure n (or tension t) is zero, and we say that the object is completely weightless

For example, an object in a satellite that moves in a uniform circular motion around the Earth has zero pressure on the satellite's floor because its vertical downward acceleration a is the gravitational acceleration g at the position of the satellite.

Of course, in daily life, we can also experience overweight and weightlessness. For example, in an elevator, we can go through the process of being overweight and weightless. When the elevator starts to ascend, we are overweight at this point as we have an upward acceleration along with the elevator.

On the contrary, when the elevator starts to descend, we are weightless at this point as we have a downward acceleration along with the elevator. If the elevator breaks down, we will fall down with the elevator. We must be completely weightless at this point.

However, of course, we would rather not have such an experience.

1. In space life in a weightless environment, all kinds of food, parts, utensils, etc. are fixed. In order to prevent food crumbs from flying everywhere in space and affecting the normal operation of astronauts or equipment, astronauts' food is often packaged in small packages to make squares, rectangles or small balls similar to the size of their mouths.

2. If astronauts want to drink water, when eating soup, soup, rotten juice, and jam, they can squeeze it directly into their mouths from plastic bags or toothpaste-like soft aluminum tubes.

3. To go to the toilet in space, you must sit on a well-designed toilet, and the old letter floats in mid-air. When you sit up, put your feet in the fixed leg covers, tie the seat strap around your waist, and hold the handle with your hands.

4. Now, astronauts can use microwave heaters to bake food in space capsules. These microwave heaters have special recessed cells on them. Foods that need to be heated must be fixed in these compartments.

A state in which an object moves freely in a gravitational field without exhibiting weight or lightness, 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).

Definition: Refers to an object that loses the action of the gravitational field.

Gravity: A component of the Earth's gravitational pull on an object.

Main phenomenon: The pressure of the object on the support is less than the gravitational force.

Classification of weightlessness: complete weightlessness and non-complete weightlessness.