What does G mean in astronautics?

Gravitational acceleration.

A g means that your current acceleration is gravitational acceleration, and the force you are subjected to is the gravitational force of the earth itself; 2 g is twice the acceleration. Force f=mg, acceleration a=f m, so a few g's means how many times the acceleration of you and the entire spacecraft is how many times the acceleration is due to gravity. Astronautics, the mass is certain, the greater the thrust provided by the high-power engine, the greater the acceleration, the astronaut has inertia, so the spacecraft forward, the astronaut is equivalent to backward, the spacecraft gives the astronaut a mile, so that the astronaut accelerates forward to the same speed as himself, the greater the propulsion power, the faster the spacecraft accelerates, the faster the astronaut will accelerate, f=ma, it can be known that the astronaut mass remains the same, the greater the acceleration, the greater the force on the astronaut.

When the force is too great, the human body will be harmed. Just like "Three-Body Problem 3 - Death and Eternal", it is forcibly accelerated, and does not enter the inertial medium with deep-sea liquid as the main body, and the person is directly slapped on the wall like pressing a meatloaf, and the blood spreads on the wall in a divergent manner. Another example is in Star Trek 2 - Darkness Unbounded, where the Enterprise is gravitationally pulled by Earth.

Grab, accelerate towards the ground, and unprepared people will stumble over the wall or even get sucked into the wall. (These are a bit exaggerated, the film does not take into account weightlessness in outer space, and is captured by gravity at a long distance, the acceleration is not large, and the characters are a bit exaggerated on the wall).

Astronauts will sit in a place where they can do circular motions when they are training.

As the speed of rotation increases, the greater the force on the astronaut, where centrifugal force is used.

In place of gravity, astronauts are required to withstand about 8 g. Centrifugal force or centripetal acceleration, a=mv radius r

A capital g denotes the gravitational constant, and the accepted result is the Cavendish determination of the g-value, which is, and the latest recommended criterion is g=. Usually take g=. Sometimes it also indicates gravitational g.

Whereas, lowercase g indicates gravitational acceleration, which is the amount of change in velocity caused by gravity per unit of time.

"Spaceship" and "Electronic Calculator" represent modernization. In the poem "Yan'an, I Pursue You", the author uses the words "space shuttle" and "electronic computer" to represent modernization. Spaceships, electronic computers, these are the products of the development of modern science and technology.

Indicates the progress of our country. "Old cattle broken car" represents the backward production conditions in the past, the efficiency is very low, and the speed is very slow. The "backbone" represents the spirit of Yan'an.

What the author wants to pursue is actually the spirit of Yan'an.

"Yan'an, I'm Chasing You".Like a returning swallow, in pursuit of the spring of the past;

Like a thriving tree, chasing the rain and sun.

Chasing you, the flowing water of the Yanhe River, chasing you, the fragrance of pear blossoms in the jujube garden.

Chasing you, the head of Nanniwan's wasteland, chasing you, Yang Jialing took the spring cover to give a speech.

Rows of high-rise buildings have sprung up like mushrooms after a rain, and household appliances are full of noisy;

We said goodbye to the dilapidated thatched hut forever, but we can't forget the warm earthen kang in the Yan'an cave.

The space shuttle explores the mysteries of the universe, and the electronic computer plays a wonderful symphony;

We did not hesitate to throw away the old cow and broken cart, but we could not lose the backbone of the pagoda on the top of the mountain.

Yan'an, your spirit is brilliant!

If you lose you, it is as if you have no soul, how can you spread your wings and fly towards a better future?

Yes! Yan'an, I will pursue you, pursue faith, and pursue golden ideals;

Pursue warmth, pursue bright spring;

Pursue the light, chase the fiery sun!

First, cosmic velocity refers to the velocity that a spacecraft must have when moving in a circular motion along the earth's surface, also known as orbiting velocity. At this point, it is the gravitational force that provides the centripetal force.

Using the gravitational formula f=gmm r 2=mv 2 r, i.e., gm r=v 2, we get v=(gm r) (1 2).

where v is the first cosmic velocity, g is the gravitational constant, m is the mass of the star, and r is the radius of the star.

Different planets M and R are different, so their first cosmic speed is also different, and ambition is just a slave to memory, born vigorously, but it is difficult to grow.

is the gravitational constant, approximately equal to.

If you are talking about v=sqrt(gm r), this g is the gravitational constant.

If you're talking about v=sqrt(gr), this g is.

Definition of generation and example sentence analysis.

As a small part of the universe, no one can explain the mystery of the whole world, and the so-called formula is just one person's point of view.

It is described as: g=8 t is the Einstein field equation, where g is called the Einstein tensor and t on the right is the momentum energy tensor.

In layman's terms, Einstein's tensor describes the collective properties of space-time, while t describes the properties of matter in motion. The meaning of this equation is that the nature of the motion of matter will affect the distribution of space-time to some extent.

Further generalization, the conclusion of this equation is that under the action of the gravitational field, space-time will be bent to varying degrees, which cannot be explained as the whole universe, but only by the role of space-time in matter and properties.

Hello Huai slow shooting!

Fortune is a small part of the universe.

No one can explain the mystery of the whole world.

The so-called formula.

It's just one person's point of view.

Hope it helps, hopefully.