why rocket is used for space?

Answer 1

This concept of "throwing mass and benefiting from the reaction" can be hard to grasp at first, because that does not seem to be what is happening. Rocket engines seem to be about flames and noise and pressure, not "throwing things." Let's look at a few examples to get a better picture of reality:

If you have ever shot a shotgun, especially a big 12-gauge shot gun, then you know that it has a lot of "kick." That is, when you shoot the gun it "kicks" your shoulder back with a great deal of force. That kick is a reaction. A shotgun is shooting about an ounce of metal in one direction at about 700 miles per hour, and your shoulder gets hit with the reaction. If you were wearing roller skates or standing on a skateboard when you shot the gun, then the gun would be acting like a rocket engine and you would react by rolling in the opposite direction.

If you have ever seen a big fire hose spraying water, you may have noticed that it takes a lot of strength to hold the hose (sometimes you will see two or three firefighters holding the hose). The hose is acting like a rocket engine. The hose is throwing water in one direction, and the firefighters are using their strength and weight to counteract the reaction. If they were to let go of the hose, it would thrash around with tremendous force. If the firefighters were all standing on skateboards, the hose would propel them backwards at great speed!

When you blow up a balloon and let it go so that it flies all over the room before running out of air, you have created a rocket engine. In this case, what is being thrown is the air molecules inside the balloon. Many people believe that air molecules don't weigh anything, but they do (see the page on helium to get a better picture of the weight of air). When you throw them out the nozzle of a balloon, the rest of the balloon reacts in the opposite direction.

The above stated is the principle of rockets.

In simple, I would say, Rockets are more powerful in acceleration to space and are mostly undamaged and can be used in any situation.

Hope this answer solves your question.

Regards
Praveen Kumar

Answer 2

In military use, rockets generally use solid propellant and are unguided. Rockets equipped with warheads (representing a form of missile) can be fired by ground-attack aircraft at fixed targets such as buildings, or can be launched by ground forces at other ground targets. During the Vietnam era, there were also air-launched unguided rockets that carried a nuclear payload designed to attack aircraft formations in flight. In military terminology, the word missile is often preferred over rocket when the weapon uses either solid or liquid propellant, and has a guidance system. (This distinction generally does not apply to civilian or orbital launch vehicles.)

Rockets are used to accelerate, change orbits, de-orbit for landing, for the whole landing if there is no atmosphere, e.g., for landing on the Moon, and sometimes to soften a hard parachute landing immediately before touchdown..

Answer 3

oxygen isn't availiable in sufficient quanties to propel craft at the densities that we try to send. later better designs can take advantage of solar winds, etc to do the same thing.

rockets don't have props.

explosive distributive funneling is the only way we can overcome gravity and produce the angular momentum needed to propel a potential spacecraft past the earth-gravity bond. we have to pack all the fuel and oxygen into a rocket at once, and a rocket is the only way to do this.

Answer 4

the only might desire to apply gasoline in area is whilst a metamorphosis in velocity or direction is needed. If the direction of the rocket is the needed one, then there is not any might desire to fireside that is engines.

Answer 5

because in space no air is available for mvement of aeroplane. furthermore other things cannot move as fast as to come out of gravitational force of earth.

Answer 6

Because they use propellant with oxidizer included, which is necessary out of the atmosphere.

Answer 7

Props need air.

Answer 8

it can be more faster such that it can overtake the escape velocity