What was the first velocity of the universe and what was the first cosmic velocity

First cosmic velocity: The first level of cosmic velocity, when the object has a velocity per second, the motion is balanced by the gravitational attraction of the earth, and it does not fall back to the ground and moves in a uniform circular motion around the earth. Hence the name "orbital velocity".

Second, cosmic velocity: When an object moves with a velocity per second, it can have a gravitational pull away from the earth and no longer let the earth move; Therefore, this velocity is also called disengagement velocity.

Third cosmic velocity: When an object has a velocity per second, it can break away from the gravitational pull of the sun and no longer let the sun move.

the fourth cosmic velocity; When an object has a velocity of 110 120 km per second, it can break away from the gravitational pull of the Milky Way. to an alien galaxy.

First cosmic velocity (v1) The velocity that a spacecraft must have when moving in a circle along the earth's surface, also known as orbital velocity. First, there are two aliases for cosmic velocity: the minimum launch speed of the spacecraft and the maximum operating speed of the spacecraft.

In some cases, it is said that when a spacecraft is moving at the first cosmic velocity, it means that the spacecraft is moving along the Earth's surface. According to the theory of mechanics, it is possible to calculate v1 7 9 km seconds. The spacecraft is orbiting at an altitude of more than hundreds of kilometers above the surface of the ground, and the gravitational pull of the ground on the spacecraft is smaller than that on the ground, so its speed is slightly less than V1.

First, the cosmic velocity is kilometers and seconds. The first cosmic velocity refers to the velocity that the object needs to achieve in a uniform circular motion around the earth, because the first cosmic velocity is widely used in the aerospace field, so it also has the nicknames of "minimum launch velocity of spacecraft" and "maximum operating speed of spacecraft".

Scientific Principles:

When the velocity of the cannonball reaches "kilometers and seconds", the cannonball no longer falls back to the ground (regardless of the atmospheric effect), but flies in a circle around the earth, which is the first cosmic velocity.

First, cosmic velocity is also the velocity that an artificial satellite must have to make a "uniform circular motion" around the Earth near the ground. But as the altitude increases, the Earth's gravitational pull decreases, and the flight speed required to orbit the Earth also decreases, and all spacecraft fly outside the atmosphere very high above the ground, so they all fly at a lower speed than the first cosmic velocity.

When an artificial satellite moves in a uniform circular motion around the Earth near the ground (height ignorance), its orbital radius is approximately equal to the Earth's radius r, its centripetal force is the Earth's gravitational attraction to the satellite, and its centripetal acceleration is approximately equal to the gravitational acceleration at the ground. The gravitational force on an object Gravitational force is the centripetal force of a spacecraft in a circular motion along the Earth's surface.

What is the first cosmic velocity?

What is the first cosmic velocity?

The velocity that an artificial satellite must have to make a uniform circular motion around the earth in the vicinity of the earth is called the first-principle velocity. The size is km s

The answer is 1 times.

Derivation process: g = n*m 2 kg2 (gravitational constant).

m = mass of the Earth).

r=radius of the earth).

v=(gm r) 1 2= km s (first cosmic velocity).