According to Newton's third law, every action has an equal and opposite reaction. In a small experiment, high-speed jet gas, such as hot air, compressed air or high-temperature and high-pressure gas produced by combustion, is generated by releasing gas or burning fuel, and it is discharged to generate upward thrust. This process conforms to the principle of rocket propulsion.
The principle of rocket propulsion is based on the law of conservation of mass and momentum. The combustion of fuel in a rocket will release huge energy and convert the fuel into gas injected at high speed. According to the law of conservation of mass, the mass of rocket fuel decreases, while the mass of exhaust gas increases, and the total mass in the system remains unchanged.
Because the gas velocity produced by combustion is very high, according to the law of conservation of momentum, the total momentum of the system remains unchanged. Due to the high injection speed and small mass of gas, the rocket obtains corresponding upward thrust.
To sum up, the principle of soaring experiment is mainly to release the gas produced by combustion or jet gas at high speed, and use Newton's third law and rocket propulsion principle to generate upward thrust, so that the experimental equipment can fly off the ground.
Expand knowledge:
Newton's third law of motion and acceleration is usually expressed as follows: the acting force and reaction force between two interacting objects are always equal in size and opposite in direction, and act on the same straight line.
This law was put forward by isaac newton in his book Mathematical Principles of Natural Philosophy 1687. Newton's third law of motion, the first and second laws together constitute Newton's law of motion, and the basic law of motion in classical mechanics is expounded.
Rocket propulsion is a high-power device with hydrogen and oxygen as fuel. There are two forms of propellant used in rocket engines, one is liquid and the other is solid. Because the energy produced by solid combustion agent is higher than that produced by liquid combustion agent.