Hard to believe, but the history of rockets is much, much older. That was in the 270s BC. At that time, Chinese chemists discovered gunpowder. In the beginning, however, gunpowder was used only to light fireworks. Later it was seen that this gunpowder is very useful including firearms and bombs. This old history is not exactly of rocket, but it must be admitted that rocket science started there.
In 1912, Robert Goddard of the United States built the first liquid fuel rocket. This is the beginning of the modern era of rockets. Earlier, only solids were used as fuel. To date, Nasai alone has launched more than 500 rockets from its Cape Caveral. In all, more than 5,000 artificial satellites have been launched into space around the world.
Although the history of the rocket is thousands of years old, Newton's source has revealed the science behind the rocket. The Naturalis Principia Mathematics, published in 18, contains three formulas describing the motions of all objects.
The first formula: ‘If you do not force the ball from outside, the stationary object will remain stationary and the moving object will continue to move.’ The rocket also remains stationary before the force is applied. It goes on in space until someone or something stops.
The second formula: the greater the mass of an object, the greater the force required to change its velocity. The ball comes from the pressure of the rocket's explosion. As a result of its impact, the speed of the rocket increases. The mass decreases as the propellant burns. So the speed continues to increase.
Third formula: This is the main formula. ‘Every action has an equal and opposite reaction.’ When a rocket is fired, gas starts to be emitted from its engine. And the rocket fired in the opposite direction. The way a boat jumps or shoots a gun when it jumps.
How liquid fuel rockets work
When we hear the word rocket, we think that something like a pipe is running through the corner of the sky! But cars or jet packs (the technique of floating in the air with a gas bag on the back) can also be an example of a rocket. The basic structure of all rockets is almost the same. Looks like a tube. There will be propellant (fuel and oxidizer). One or more engines, stabilization devices to provide gas expansion and acceleration.
How is a rocket launched?
If you throw something upwards, it comes down. But if the speed of the throw is about seven miles per second (11.2 km), then it will not return to the Earth's chest. If you throw an object without bending it up, it will follow a circular path and go a little farther and fall down. Throwing harder will make this range bigger. If you hit it at a certain speed, it will never land again. Will continue to revolve around the earth. Will find an orbit. Will turn into an artificial satellite. When launching a satellite, you have to give this minimum speed. The orbits of objects thrown at different speeds in the picture.
