farce and motion, froce or motion
2006-10-09 08:12:13 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Aircraft
with big engines and lots of fire!!
2006-10-09 08:14:55 · answer #1 · answered by L6 3 · 0⤊ 0⤋
Reagrdless of the medium through which rockets travel- Torpedos in water, "normal" rockets in air and space rockets through vacuum, they all take advantage of Newton's Third Law, which states that whenever one body implies a force on another body, the latter will imply an equally strong, oppositely directed force on the former. This is true even if they lack physical contact (look at the gravitational forces between planets).
So what rockets do is burn up solid or liquid fuel and allow the resulting very energized gas to escape through the rear of the rocket (the point on the rocket furthest from the head of the rocket travelling 4ward). This way, the gas particles, being forced by the rocket to go back, push the rocket back forward in what was hinted 2 B a very large force.
Air and Liquid missiles might also use some sort of engine in order 2 travel quickly through their medium, but generally all rockets make some use of the principle Newton discovered: "To every action there is reaction".
2006-10-09 08:25:27 · answer #2 · answered by Yankuta118 2 · 0⤊ 0⤋
The force of gasses expanding in the nozzle pushes it forward. Since the nozzle is open at the back, there is nowhere for the gasses to push so the forces are unbalanced. The side forces cancel each other out.
The rocket does not need to push against anything (like air or the ground) to function and these actually reduce thrust.
The formula for rocket thrust is MV + Aj(Pj-Pamb) where M is mass gas flow, V is the velocity of the gasses exiting, Aj is the area of the nozzle, Pj is the pressure of the gasses and Pamb is ambient pressure.
The rocket nozzle is a bell shaped device which captures the expanding gasses and allows the pressure to push the nozzle forward, even though the gasses cannot exceed the speed of sound.
2006-10-09 09:48:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Newton's third law of motion: every action has an equal and/or opposite reaction. as fuel gets ignited onboard the rocket, the fuel gets pushed downwards (in the case of the Space Shuttle's Solid Rocket Boosters), once there is sufficient force acting upon the shuttle, it lifts off in the opposite direction
2006-10-09 16:16:40 · answer #4 · answered by mcdonaldcj 6 · 0⤊ 0⤋
Fuel is burned and expanded. The gasses from this expansion are espelled through one o more openings, and the rocket will move in the opposite direction than the one the nozzle is pointing at. for stearing withing the atmosphere, fins are used just like an aircrafts winsh surfaces. In space, smaller rockets that point in different dirrections are use, resulting in the same reaction as for forward movement.
2006-10-09 09:13:04 · answer #5 · answered by Timothy B 4 · 0⤊ 0⤋
This is one of Newtons Laws of Motion (forgot which one) that says every action has an equal and opposite re-action.
Therefore, the force of the burning propellant (thrust), causes the rocket to move in the opposite direction.
As rocket fuel produces it's own oxygen by the chemical reaction, it can be used in the vacuum of space where other types of engine can not.
2006-10-09 08:16:40 · answer #6 · answered by Anonymous · 2⤊ 0⤋
It is due to Newton's 3rd law of motion - "Every action has an equal and opposite reaction." The fire that comes out of the nozzle actually comes out with a tremendous force that it pushes the rocket to go upwards.
2006-10-09 18:32:56 · answer #7 · answered by Narender 1 · 0⤊ 0⤋
IT IS PROPELLED BY A DIRECTIONAL APPLICATION OF A ROCKET FUEL AS IT EXPANDS ON IGNITION.
2006-10-09 08:14:33 · answer #8 · answered by Anonymous · 0⤊ 1⤋