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Why can a spacecraft traveling in space can travel at a constant speed and in a straight path without using engines?
Wiki User
∙ 15y ago
To generate any sort of power on Earth, you need to transform energy from one form to another.
The brakes on your car for example, turns kinetic energy (friction) into thermal energy in order to generate the stopping power. Energy is all around us, and it cannot be destroyed, only transformed.
The trouble then comes to figuring out the best ways to vent the thermal energy from the brakes to make them more effective.
In space an object has 'Mass' but not 'Weight'. As weight is calculated against gravity, which is obviously missing in space.
There is also no air, no energy. So if a spacecraft is propelled through space there is no resistance to push it faster, or push against it to slow it down. Its a void where a spacecraft would have to transform it own energy (in the way of thrust) in order to maneuver
Wiki User
∙ 15y ago
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How four-stroke engines work?
four strok engines are like a scale down version of a car engine. They work the same way. unlike 2 stroke which can work any way E.G: upside down etc. 4 stroke engines need to positioned the right way so they can have a constant flow of oil. does this help?
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 are two main types of rocket engines?
The two main types of rocket engines are Solid fuel rocket engines and Liquid fuel rocket engines.
Examples of both 'horizontal' search engines and Vertical' search engines?
Horizontal search engines are general-purpose search engines such as Google and Yahoo. Vertical search engines, meanwhile, are specialized by content such as Trulia, Mocavo and Yelp.
Are car engines pulleys?
yes car engines are pulleys
The differences between an aircraft and a spacecraft?
Spacecraft lack wings & their engines don't require air to function.
What is better constant torque or constant power engines?
mk
Why are rocket engines used to launch a spacecraft?
To give the space craft a boost
The four types of siege engines?
Straight/Inline engines, V type engines, Rotary engines and diesel engines
What types of car engines exist?
There are a number of different types of car engines. Some of these engine types are Straight/Inline engines, V type engines, Rotary engines and diesel engines.
Are the exhaust gases from vehicles ionised?
No. not earthly vehicles. Some spacecraft have ion engines (at least they have been proposed).
When will a mass of a spaecraft change?
Since the spacecraft's fuel supply is mass, then the mass will decrease whenever the engines are started. If the spacecraft collides with space dust or a rock, then the total mass will increase slightly. Of course, if it's a big rock, the spacecraft may be destroyed in the collision.
What is the difference in propulsion between an airplane a spacecraft?
Aircraft are driven by air breathing engines whether combustion or jet. All spacecraft must be propelled by rocket or something else that needs no air to perform
Constant pressure cycle used in which engine?
Gas turbine engines and airbreathing jet engines use the Brayton Cycle.
The period when spacecraft is following a trajectory but is not using its engines is?
Free flight assessable flight open flight or terminal flight
What is the acceleration of a jumbo jet cruising at constant velocity of 1613.5 km h when the thrusting force of its engines is a constant 112750 N?
If the velocity is constant, then the acceleration is zero.
Will the torque characteristics of all engines always be a straight line graph?
No
