What form of mass is a rocket engine throwing'?

As a rocket travels upwards the engine thrust remains constant but the mass of the rocket decreases Why?

The primary answer is that a rocket under constant acceleration is using up fuel, so it's mass decreases as the fuel is spent.

How is the mass of the rocket change when it lits of?

The mass of the rocket does not change, no matter what it is doing. The mass of the fuel inside the rocket will decrease as it is used up.

Why do engineers need to keep the mass of a spacecraft as low as possible?

The heavier it is the stronger the engine has to be. And the stronger the engine the more fuel will it burn. And the more fuel it burns the more fuel has to be carried in the rocket. And the more fuel the rocket has to lift the stronger the engine has to be.

What is the mass of a model rocket?

Model rockets can use anything from 1/4A to G engines.Amateur rockets can use up to N engines.Professional rockets have no limit.Each successive engine letter has twice the power of the previous. Assuming Professional rockets start with O engines, the smallest Professional rocket engine has 256 times the power of the largest Model rocket engine. Most will of course be much larger.

What is the center of mass on a Estes rocket?

How can you find the center of mass of an object like a bottle rocket?

Where should the center of mass be located on a rocket?

near the nose of the rocket

How does a rocket change its speed in space with no air?

Some people (who have not studied physics) believe that rockets work because the rocket exhaust pushes against the air, and therefore in the vacuum of space where there is no air, rockets won't work - but that is not the case. Rocket exhaust doesn't need to have air to push against. The expanding gases in the rocket's exhaust nozzle push against the rocket. The gas has its own mass and its own inertia, and the change in momentum of the exhaust gas causes an opposite change in momentum of the rocket. This can be difficult to grasp because we think of gas as being virtually weightless, but a large rocket can emit literally tons of exhaust. The fact that it is in the form of a gas doesn't change the result; mass is mass, whether solid, liquid, or gas.This is WRONG, rocket DOES work in space.From NASA"A rocket is a type of engine that pushes itself forward or upward by producing thrust. Unlike a jet engine, which draws in outside air, a rocket engine uses only the substances carried within it. As a result, a rocket can operate in outer space, where there is almost no air."How it accelerate"Rocket engines generate thrust by putting a gas under pressure. The pressure forces the gas out the end of the rocket. The gas escaping the rocket is called exhaust. As it escapes, the exhaust produces thrust according to the laws of motion developed by the English scientist Isaac Newton. Newton's third law of motion states that for every action, there is an equal and opposite reaction. Thus, as the rocket pushes the exhaust backward, the exhaust pushes the rocket forward.The amount of thrust produced by a rocket depends on the momentum of the exhaust -- that is, its total amount of motion. The exhaust's momentum equals its mass (amount of matter) multiplied by the speed at which it exits the rocket. The more momentum the exhaust has, the more thrust the rocket produces. Engineers can therefore increase a rocket's thrust by increasing the mass of exhaust it produces. Alternately, they can increase the thrust by increasing the speed at which the exhaust leaves the rocket."http://www.nasa.gov/worldbook/index.html

What additives give rocket engines forward momentum?

Chemical rockets combine a fuel chemical and an oxidizer chemical to produce combustion products (a new, combined chemical with an ever-so-slightly lower mass than the components, and lots of energy). In the space shuttle main engine (SSME) the fuel was liquid hydrogen (other common liquid fuels are alcohol and kerosene) and the oxidizer was liquid oxygen. The rocket engine is a bell with an open end, or nozzle. When the hydrogen and oxygen are combined in the bell, they burn to produce water vapor and energy. The released energy forces the mass of the water vapor out the open end of the engine in one direction and, by conservation of momentum (Newton's third law), the mass of the rocket is propelled in the opposite direction. So, rather than a specific additive, everything that is burned in the engine provides mass that contributes to the momentum that propels the rocket.

What is the difference between model rockets and real rockets?

In a real rocket, there is short a time in atmosphere and the aerodynamics are less important. In a model rocket, all flight in the atmosphere and the aerodynamics are very important. In a real rocket, it has a liquid or solid rocket engine and a large propellant mass fraction. In a model rocket, it has a solid rocket engine and a small propellant mass fraction . In a real rocket, there are four forces during atmospheric flight. In a model rocket, there are four forces throughout flight. In a real rocket, there is a long powered flight . In a model rocket, it has a very short powered flight . In a real rocket, it has passive stability and active control . In a model rocket, it has passive stability and no control. In a real rocket, it has expensive materials such as aluminum, titanium, and nickel alloy. In a model rocket, it has inexpensive materials such as balsa, cardboard, and plastic. In a real model, there is a high speed and the heating is very important. In a model rocket there is low speed and the heating is not important.

Working principle of rocket engine?

A rocket engine, or simply "rocket," is a jet engine[1] that uses only propellant mass for forming its high speed propulsive jet. Rocket engines are reaction engines and obtain thrust in accordance with Newton's third law. Since they need no external material to form their jet, rocket engines can be used for spacecraft propulsion as well as terrestrial uses, such as missiles. Most rocket engines are internal combustion engines, although non combusting forms also exist.Rocket engines as a group, have the highest exhaust velocities, are by far the lightest, and are the most energy efficient (at least at very high speed) of all types of jet engines. However, for the thrust they give, due to the high exhaust velocity and relatively low specific energy of rocket propellant, they consume propellant very rapidly.

What happens to the weight of a rocket when it takes off?

The mass of the rocket decreases as fuel burns.

A force of 1500 N gives a rocket an acceleration of 2.5ms2 what is the mass of the rocket?

it is 600kg