Two very basic questions about momentum in space

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Discussion Overview

The discussion revolves around two questions related to momentum in space, particularly focusing on the behavior of spinning batteries and the implications of electromagnetic fields on momentum. Participants explore concepts of mass distribution, center of mass, and the potential for movement in a vacuum.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that loading a spinning battery increases its weight and may affect its rotation, questioning how Newton's laws apply in this context.
  • There is a suggestion that the work done on the rotating object changes its center of mass, which could lead to a shift in the center of rotation.
  • Others inquire whether altering an electromagnetic field can create momentum and if a vehicle could be moved within that field.
  • Some participants express uncertainty about the implications of moving mass between batteries in a rotating system and whether it affects Newtonian momentum in a three-dimensional space.
  • One participant mentions a specific example involving a rotating object exposed to sunlight and questions how mass loading affects its movement and stability.
  • There is a reference to Reactionless Drives, which some participants acknowledge as a controversial topic and potentially forbidden in the forum.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the implications of loading the batteries or the effects of electromagnetic fields on momentum. Multiple competing views remain regarding the interpretation of Newton's laws in these scenarios.

Contextual Notes

Participants express various assumptions about the behavior of mass and momentum in rotating systems and electromagnetic fields, but these assumptions remain unresolved. The discussion includes references to specific concepts that may require further clarification.

Who May Find This Useful

This discussion may be of interest to those exploring concepts in classical mechanics, electromagnetism, and theoretical applications of momentum in non-traditional contexts.

Juuso
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This first question of mine is about momentum?
And opposite forses.

Lets think we have two batteries or something similar
spinning in space like in carusel structure.
And the batteries are athe more spinning end.
First the batteries are empty and we start loading
the first battery.
So em i wrong that now this battery weight goes up?
And what happens to this spinning thing

And what happens when now we move the energy
to this second battery from this first one?

I ask this because there is suppoust to be
any momentum but maybe a change in spin
axix or not? So how the Newtons momentum
should understand in electric changes?

And the second question of mine is this.

If we make a electromagnetic field and
we alter this field by other field like some
emitter or like. And this first field
is at rapid on and of pulse
can we make momentum?
So if we think some kind of
vehicle and so can we move it in
this field in space or can we move this field
for momentum?

If someone can give me some basic real answer
I would be happy!
 
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Juuso said:
Lets think we have two batteries or something similar
spinning in space like in carusel structure.
And the batteries are athe more spinning end.
First the batteries are empty and we start loading
the first battery.
So em i wrong that now this battery weight goes up?
And what happens to this spinning thing

And what happens when now we move the energy
to this second battery from this first one?

I ask this because there is suppoust to be
any momentum but maybe a change in spin
axix or not? So how the Newtons momentum
should understand in electric changes?
Welcome to the PF.

The work being done will change the center of mass of the rotating object, so it will just rotate a bit off of its geometric center. Just as if you had a person in the middle of the rotating object, and they did some work to pull part of the mass at one end of the rotating structure toward them. That only changes the center of mass (COM) and hence the center of rotation.
Juuso said:
If we make a electromagnetic field and
we alter this field by other field like some
emitter or like. And this first field
is at rapid on and of pulse
can we make momentum?
So if we think some kind of
vehicle and so can we move it in
this field in space or can we move this field
for momentum?
It sounds like you are asking about EM Drives or Reactionless Drives, which are forbidden topics here. Please be sure to read the PF Rules under INFO at the top of the page, as well as the EM Drive link below. Thank you.

https://www.physicsforums.com/threads/emdrive-revisited.338268/
 
berkeman said:
Welcome to the PF.

The work being done will change the center of mass of the rotating object, so it will just rotate a bit off of its geometric center. Just as if you had a person in the middle of the rotating object, and they did some work to pull part of the mass at one end of the rotating structure toward them. That only changes the center of mass (COM) and hence the center of rotation.

It sounds like you are asking about EM Drives or Reactionless Drives, which are forbidden topics here. Please be sure to read the PF Rules under INFO at the top of the page, as well as the EM Drive link below. Thank you.

https://www.physicsforums.com/threads/emdrive-revisited.338268/
Ok! First sorry if this second question was at forbitten topics. So I leave this out.
 
Ok! I am sorry if this second question was off- topic
by this EmDrive forbitten issue. Sorry about that.

So did i get this right that in this battery scenario
it is possible to move mass to this second battery
without making Newton momentum forse to other
x-y-z scale? But if in space we try to move mass
in like common movement there happens x-y-z movement
if this mass is not in vacum?

So if first we have some axeled things
and in these two we have battery we can choose
in space withc keeps like in still and witch one moves
in this scenario?

And I hope this post gomes to right place pecause I am
legally Blind and this is quite hard to me to focus
tthese all things at this html page. So sorry if this
is at wrong area or something like.

But this battery scenario is to me little tricky
and i like to think about these kind of topics.

Thanks for answer
 
Juuso said:
Ok! I am sorry if this second question was off- topic
by this EmDrive forbitten issue. Sorry about that.

So did i get this right that in this battery scenario
it is possible to move mass to this second battery
without making Newton momentum forse to other
x-y-z scale? But if in space we try to move mass
in like common movement there happens x-y-z movement
if this mass is not in vacum?

So if first we have some axeled things
and in these two we have battery we can choose
in space withc keeps like in still and witch one moves
in this scenario?

And I hope this post gomes to right place pecause I am
legally Blind and this is quite hard to me to focus
tthese all things at this html page. So sorry if this
is at wrong area or something like.

But this battery scenario is to me little tricky
and i like to think about these kind of topics.

Thanks for answer
It still sounds like you are talking about Reactionless Drives. Have a look at this wikipedia page to see if it helps to answer your questions:

https://en.wikipedia.org/wiki/Reactionless_drive

:smile:
 
Ok!
But do you remember this thing that has axle and
wings one side black and other side silver or aluminium like?

Now let's forget the axle and think that this is at space
and sun is bursting to this thing.. So it starts to rotate
by its axis or em i totally wrong?

And now let's image that in both sides at the point
the sping is higher are batteries. So now if we load
this other end that is not having the maximum light effect
we load its battery the mass point change to this point and
the rotation point can be alterted?

And if I have understood correctl. Now we can move this
thing in some where we need?

And this is not a Emdrive or something like this but
more like ship in wind that has stability more than lability?

Or does this thing stay put and only moves out of the sun to
pointles cordination?

By the way and sidemark. Do you work at 50mc band?

But as endmark has this mass change any relevant profit
or does the Newtons law to cut this benefit if there is
working idea at all?

Thanks for advice
 
Thread closed temporarily for Moderation...
 
Juuso said:
do you remember this thing that has axle and
wings one side black and other side silver or aluminium like?

Do you mean the Crookes radiometer?

https://en.wikipedia.org/wiki/Crookes_radiometer

If so, you should read the Wikipedia page carefully, particularly the section on "effect observations".

Juuso said:
So it starts to rotate
by its axis or em i totally wrong?

It won't rotate in a hard enough vacuum; see the Wikipedia page.
 

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