The rocket moves upward and the gases move downwards during a rocket launch. which principle is used during the take off over here?
Answers
Answer:
According to me, two possibilities are there.
First one being the principle of Upthrust and second one being Newton's Third Law of motion.
Explanation:
What is Upthrust? It is a force due to the formation of pressure in the upward direction. The gases which are mainly made of Oxygen and Hydrogen, create a very powerful pressure which gives an upthrust to the rocket and defies gravity in much higher velocity to go to the space.
On the other principle, Newton's Third Law of motion states:
"To every action, there is an equal and opposite reaction".
It means that consider an Object A lying on the table.Object A applies force (action force) on the table due to its weight, but at the same time, Object A experiences the same, equal and OPPOSITE force from the table which keeps the Object A stable.
If Object A is applying 5 N of force downwards on the table, the table will apply 5 N upwards on the Object A, which will stabilize both the forces.
Same happens in the rocket. The fuel of the rocket burns in the nozzle of the engine, which creates a lot of gas on the ground. The gases apply a very high amount of force on the ground, but due to pressure, the rocket experiences equal and opposite force exerted by the gases. But, you may ask that the forces will get stabilized, then how the rocket gains upthrust? This is because the rocket gains an equal amount of velocity from the reaction force of the gases and their pressure. So, it gains velocity to defy gravity before the forces get stabilize. Also, when the rocket is in air, the gases still burn in the nozzle of the engine to create more velocity of the rocket. This makes the rocket to defy gravity and go to the space.
Hope this clears your doubt. Thanks!