Rockets work by burning a fuel source. There are liquid engines and solid engines.
Solid rocket engines work just like fireworks. The engine is ignited and the solid fuel inside them burn until they burn out. The thrust caused from the burning fuel is directed out the nozzle of the rocket. That pushed the rocket in the opposite direction.
Liquid fuel engine work in the same way, but they use liquid fuel just like a car does.
One way to think of it is to think of a balloon. A balloon expands because the air pressure inside is pressing against all of the interior of the balloon at the same pressure. When you let go of the end of the balloon, the air is pushing out of the end of the balloon and that action caused the balloon to move in the opposite direction.
For every action there is an equal but opposite reaction.
thrust of the rocket engine
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Thrust, gravity and upthrust help launch a rocket.
control
A rocket is said to launch when it leaves the ground -- is thrust into the sky.
Booster stage
The launch of a rocket occurs when the engines fire and the thrust produced overcomes the pull of gravity. If thrust exceeds the force necessary to move the payload out of the gravity well of the planetary body from which the rocket was launched, it will pass out of the orbit of the planet. If not, the payload will fall back to the planet on a ballistic path.
Astronauts launch from the earth atop a rocket or in a shuttle with at least enough thrust to achieve orbit.
a launch vehicle is the initial vehicle (rocket) that provides the package, weather it be humans or cargo, enough thrust and force to exit the atmosphere.
Thrust, which is propelling the spaceship upward, Gravity,which pulls the spaceship down, and must be overcomed by Thrust, Friction, from the air that wants to slow the spaceship down, and which also must be overcome, and Lift, which is the response from thrust and what keeps the spaceship airborne.
Enough to lift a small rocket 5-600 feet.
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