Is it possible to "violate" momentum at the expense of more energy?

In summary, the conversation discusses the concept of using a closed cylinder filled with gas or a solid ball to produce movement by applying force to one side. The idea is similar to the "emdrive" concept, but it is not clear if it is possible due to the need for increasing energy to combat momentum. The conversation also touches on the possibility of using this concept for efficient energy use in rockets. However, this idea has been deemed impossible by experts and is not allowed for discussion on certain forums.
  • #1
gggnano
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TL;DR Summary
Produce thrust in a closed chamber when the opposite momentum is compensated with more energy?
This is in fact a shamelessly simple question to a point the reason it puzzles me is because it's too simple:

So basically you have a closed empty/hollow cylinder filled with either gas or even an ordinary solid ball...and then on the left side of the cylinder you put a force on the "fuel" (gas/ball...) so that it moves to the other side and hits it producing movement. Now, since the ball will come back once it hits the right side then can you produce movement ONLY in one direction for as long as you increase the energy from the left side that pushes the ball?

In fact this idea is very similar to the "emdrive" concept:

http://nerdist.com/wp-content/uploads/2014/08/EmDrive.jpg

Yet I am not sure if the "emdrive" design realizes they will need more and more energy to battle the bouncing wave so perpetuum mobile is impossible?

And if this is possible at tall then you may say it's useless since you need more and more energy to combat momentum yet notice how if you have strong amount of heat but limited amount of fuel this is very useful. For example: you can use million degrees hot nuclear reaction in a rocket but you cannot find fuel in the cosmos to recharge the rocket...well it's not easy...thank you!
 
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  • #2
You can do anything you want if you have a sufficient supply of ""s.

Other than that, from what I can parse, you might consider that "putting a force" on the inside component to make it go to the right will cause the outside component to go to the left. No matter what you do, the centre-of-mass stays in the same place.

(If I remember, correctly) the Em drive is supposed to use some abstract group property of EMR ; the illustration you've linked to simply shows a fancier version of what you've got... which doesn't work.
 
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FAQ: Is it possible to "violate" momentum at the expense of more energy?

1. Can momentum be violated at the expense of more energy?

According to the law of conservation of momentum, momentum cannot be created or destroyed, only transferred. Therefore, it is not possible to violate momentum at the expense of more energy.

2. What is momentum and how is it related to energy?

Momentum is a measure of an object's mass and velocity. It is related to energy through the concept of kinetic energy, which is the energy an object possesses due to its motion. The greater an object's momentum, the more kinetic energy it has.

3. Is there any situation where momentum can be "violated"?

In certain cases, it may appear that momentum is being violated, but upon closer examination, it is found that the momentum is actually being transferred to another object. For example, in a collision between two objects, the total momentum before and after the collision will be the same, but it may seem like one object gained or lost momentum.

4. Can energy be created or destroyed?

According to the law of conservation of energy, energy cannot be created or destroyed, only transformed from one form to another. This means that while energy can be converted from one type to another, the total amount of energy in a closed system remains constant.

5. How does the principle of conservation of momentum and energy impact scientific research?

The principles of conservation of momentum and energy are fundamental concepts in physics and are used to understand and predict the behavior of objects in motion. They are also important in the development of new technologies and in solving real-world problems, such as designing efficient transportation systems and studying the effects of collisions in sports.

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