in which principle a rocket is to be fired and how it is working?

Answer 1

It is the good example of use of physics in the technology.
Principle of rocket is based on the Newton's third law of motion. " To every action, there is an opposite and equal reaction"
The fuel in the rocket is burned as chemical reaction and the exhaust gases escape through the small opening in the tail-end of the rocket. The gases apply tremendous force on the ground and ground exerts an equal force on the rocket. The momentum can be conserved and rocket flies to the space as its mass is very less compared to the earth. The speed increases as it moves forward as a result of decrease in acceleration due to gravity.

Answer 2

The principle used is normally propulsionA Rocket fires some type of cobustible materisl,(highly cobustible,and produces an enormous force in the opposite or upward direction as the gasses released are gushing out toward earth)

Wikipedia writs so:

Propulsion means to add speed or acceleration to an object, by an engine or other similar device. The word 'propulsion' can be used with many other words (such as jet, rocket, spacecraft) to become-'jet propulsion', 'rocket propulsion', or 'space craft propulsion' etc.

Spacecraft propulsion is used to change the velocity of spacecraft and artificial satellites. There are many different methods. Each method has drawbacks and advantages, and spacecraft propulsion is an active area of research. Most spacecraft today are propelled by exhausting a reaction mass from the back/rear of the vehicle at very high speed. This sort of engine is called a rocket engine.

All current spacecraft use chemical rockets (bipropellant or solid-fuel) for launch, though some (such as the Pegasus rocket and SpaceShipOne) have used air-breathing engines on their first stage. Most satellites have simple reliable chemical rockets (often monopropellant rockets) or resistojet rockets to keep their station, although some use momentum wheels for attitude control. Newer geo-orbiting spacecraft are starting to use electric propulsion for north-south stationkeeping. Interplanetary vehicles mostly use chemical rockets as well, although a few have experimentally used ion thrusters ,

Answer 3

Newton third law is appropriate answer. It based on the action is opposite to the reaction. In rocket the burning gases produces downward action so that the reaction is opposite and rocket goes in upward direction. But a downward gravitational force lowers the upward reaction, therefore initially rocket has less velocity as compared to action it do. As it goes in upward direction the velocity increases coz now the reaction is almost equal to the action, coz the gravity decreases as we go in the upward direction.

Answer 4

The firing of rocket is based on this law and all the previous answers are absolutely wrong
Principle of conservation of momentrum: Principle states that the total momentrum of a system is conserved (remains constant) when the net force acting on it is zero

Answer 5

Newton Third Law.In every action their is equal and opposite reaction. Rocket thrust downwards so it fly upwards

Answer 6

Conservation of Momentum

Answer 7

Newton's third law.

"For every action, there is an equal and opposite reaction."
.

Answer 8

every action has an equal and opposite reaction.

Answer 9

action has equal & opp reaction