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Change in momentum of a closed system (my theory)



From the course of physics, we are a little fooled: "it is impossible to change the momentum of a conservative system" ... as if ... mass product by speed is constant ... and blah ... blah ...
In fact, this is not so, here is an example: stand on a skate or a sled (a boat is also suitable) on some straight plane ... so that they are perpendicular to the movement ... now carefully make a sharp movement with your legs to the right (or left) at the same time moving body with a skateboard ...
According to the law of conservation of momentum ... you must immediately return after this movement (to the previous start point) ...
Because it is as if the product of the speed and mass of your one part of the body (legs with a skateboard) on the other (arms and torso) should compensate for the movement and neutralize it ...

But this does not happen here ... you are moving only in one direction ... but on the contrary - no ... make another jerk and you are moving forward again ...
In my theory, skate and you are a closed system in which the momentum changes through your sudden movement ... and interestingly, there is no fulcrum ...
In zero gravity, such a movement can lead to nothing more than a movement in one direction of space ...
Roughly speaking ... according to my theory, if it is valid ... you can create a closed-circuit rocket in which exhaust gases (or, for example, a jet of water or weights) do not fly into outer space from a rocket and, after completing the work, are removed ... or condense .. .and again used for thrust (jet) ...
Here, the drive can be a conventional electric motor (a compressor for creating a jet of water) ...
Having made a normal spurt ... Munchausen can also raise himself ...
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13 comments
Author
not only on skis ... put such a system (using jerks) on a plane flying in the air parallel to the ground ... there will be no noise from the engine and blades ...
Author
Newton may probably be right ... although not completely ... he didn’t agree ... that it is such an attraction ... G. Galilei also once was right in his own way ... when he denied I. Kepler that the tides called by lunar attraction ...
Author
Dmitry ... here's the joke about what ... in those wheels and the battery tank (on the diagram) ... the wheels spin on bearings (there is little friction) ... and the tank makes it possible to work not continuously but discontinuously (intermittently). .. I have an assumption ... that here the blows against the wall will not be so strong ... the wheels (take all the condensate onto themselves) spin and return it back ... Pay attention not to water but specially prepared condensate (to get it you need to work separate institutions ... let's say))) ... That is, water is sprayed and condensate does not already have that speed ... but the flow rate does not change ... Do not ride like this on a skateboard ... you give ... See ... put it on a smooth asphalt (not on a hill) and stand on it ... then sharply move legs (feet to the knees those on the skateboard) to the left (it’s more convenient) ... but at the same time the upper body should be ... well ... how to say ... intuitively following the footsteps to move the upper body to the left too (to don’t fall to the right) ... There really is nothing to do with it, there is no fulcrum ... the boat often sailed and rowed with oars ... there it also turns out to be standing there ... Air to move it already "not fair" ... otherwise it turns out just a flight ...
Like skiing.
Author
everything is correct ... that is, we have already agreed that it is possible to ride on the ground (without direct drive to the wheels) ... then we experiment ...
Quote: Pronin
Resistance in bearings, support reaction, friction on the road are involved

Well, why do you cause cognitive dissonance in a kid with small nitpicking! )))
After all, everything turned out well, Newton denied it, and you reproached him with some kind of friction-resistance!
In tricks with skateboards and others, resistance in bearings, support reaction, friction on the road take part. There are also hands to the sides, for balance, etc. And where there is no gravity (support reaction) and even without air, you will hang like a worm in one place ...
What's inside? Air? The jet string will interact with it and the cycle will close, there will be no traction.

Is there no air? The jet will reach the opposite side, strike (counteract) and there will be no thrust either ...
I have been thinking about such projects for quite some time.

An example with a skateboard is interesting, but I definitely did not understand where to pull my legs. But what if you stand on one leg and try to "row in the air"? The cycle is this, sharply push your foot forward, like we want to kick someone, pull ourselves, then bend at the very bottom and so on in a circle. Will there be traction?
It will turn out a jet oar ... xaxa good

When you move your leg backward, your body, along with the boat, will strive forward, and to reduce the resistance, bend your leg.
Author
a straight plane means - not a slide (altimetrically straight) ...
Author
on a sleigh so you can move around as I wrote (jerkily) ...
Author
that is, it’s impossible for you to move around on a sleigh since I wrote ... you even believe in yourself ... the problem is that many people learn physics and not everyone thinks ... I just need to believe that it’s impossible ... so you think. .. physics is not only a theory but also a practice ... which often changes the theory ...
It is very lazy to write a lot of bukaf ... but Hangover is right! ...)))
When will you calm down and instead of reasoning about
straight plane
study at least a school physics course.

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