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does this sound like it could work? Answered

i have an idea for a magnetic car that does not run an any type of motor at all. the idea is that we put a purposeful magnetic field in our roads keeping it on the same side so every magnet was for example negative. then we take our "car" for now lets call it a box and where our wheels are there is a magnet with its negative side down so that it will stay in the air. you then yous a 5th magnet in the front of the box that is connected to a lever so that you can flip it slightly to create movement. there is a little more to this idea but this is the basics of it.




1 year ago

Not to discourage you, but there are a at least a few very big problems with that idea:

Laws of Physics: From the sounds of it, looks like you trying to go against physics to get motion and energy from nothing. Good luck with that. :/


Scalability: Really REALLY big and powerful magnets are just too expensive, you will never have enough to do anything close to that scale. Neodymium is a rare earth element. Only way to feasibly make enough magnets would be to harvest asteroids!


Control: Magnets that are very powerful are also hard to deal with, and precisely governing giant floating magnets might be quite difficult. Ever played with one of those floating globes? Yeah... then you'd understand.


The idea of using magnetic repulsion has been around for a very long time, and is the core idea behind maglev trains and linear motors.

why shouldn't I challenge physics? if I can create a vehicle that doesn't need a battery/engine to produce motion then I will have solved an old question to a greener solution in society.as far as your comment on control I have been theorizing this and would need to design and test this myself first. so far I feel I am onto something. also as to your harvesting asteroids comment. why not? we could potential do it someday.

Magnets are always Dipoles, and you cannot have a magnet perpetually drawn towards another magnet because for every force you try to exploit, there will ALWAYS be a counter-force, somewhere. Everything will always cancel out in the end.


In your example, if you had an infinite XY plane with one side being North going upward, with the 'car' you describe, Say the magnet on the front is set up to attract to our infinite road, all parts of the road will pull on the magnet equally, so the net force is straight down. This is just a Force, not energy. It will result in the whole floating contraption to tilt a little.


If it is angled, There is basically no difference. All parts of the road will still pull that side down. Only now there is a torque that is also applied that is encouraging the magnet to face down and cling to the road. The user has to continuously supply a counter-torque (which is what you feel as cogging) to keep the magnet angled like that


If the magnet is flipped to repel the rest of the road, the net force is still straight up and down, because all parts of the road pull on the magnet according to the inverse square law, and the same is true for the opposite pole on the other side. Do the integration (calculus) and you will see.

interesting. I will need to find another solution for that then. thank you. perhaps it would need a motor to run however I'm thinking not that the motor would only be needed to work for one or two wheels. this is not the answer i want and i know its been thought of. I still think that there is some way to drag said box forward with out the need of a motor. or at least a reduced need of one

Have you taken any physics course yet? Engineers often use the fact that energy and momentum are conserved to design things, for many centuries.

I think the closest thing you will be able to achieve in theory would be a hovercraft-type device, using some form of propulsion to move.


If you are really this determined, study up on some multivariable vector calculus, linear algebra, and university-level physics to learn about vector fields. This will give you all the knowledge you need to compute the possibility of any device like this, and that should thoughly answer your question.

thanks for the advice. yes I'm in advanced physics but I live in Vegas and the schooling system is too low. thanks and yes I have already planed on collage. I wasn't sure what courses to take though. you just gave me a good place to start.

You've violated something called the laws of thermodynamics. Put succinctly, you can't win, you can only lose and you can't break even.

That's why you challenge physics.

ok thank you for your answer however i would still like to keep trying. if you have any ideas as to how to make it work please do share.

Sure it will work, it works now, but it is not practical for real world applications.

Google "neodymium magnet hover" or "how to make a magnetic levitation device".

thank you however i would need to find a way to move it forward under its own power. if you have any other input as to how i would appreciate it. again thank you

That may not be the best video but it is the principle monorails work on.

The same way a Maglev works. There is a video somewhere on the net of a guy doing this with neodymium magnets.

by the way to everyone who is reading my question and thinking about it I'm only 17 years old. still in high school but have and idea that while i have limited understanding the more you guy punch holes in my idea the more i am learning and so eventually my original idea is just that an original idea and i will have new answers to your holes. Thank you for spending your time and what you know into my ideas appreciate it a great deal.


another idea to toy with.

You mean like this but a car rather than a ball and on a straight track?

Well this works but a car has MUCH more mass to move - I don't see how you could have a magnet powerful enough to make it work.

Magnets have a thing about getting together as well so that might be a problem.

I imagine that I'm not trying to get ONE magnet but several magnets. when I was a child playing with the old toy stick magnets I kept thinking on the push from each other and now 17 years later I wish to start acting on it my ideas. thank you for your input

I think you're almost inventing the maglev train, but the idea of tilting a magnet to provide propulsion won't work with permanent magnets.

I've been reading up on the maglev but I feel the issue is on how they are going about it. I feel that they are missing some key detail and I'm trying to find it. thank for your input i will use it to come up with a better solution.


1 year ago

And don't forget a magnet that can pull a car and human will [A] injure an unlucky individual wearing a sharp iron belt buckle or [B] pile-on tons of massive iron dust in less then a year (how to remove the iron ??)

at that point my answer would have to be either replace the magnet de-magnetize the magnet clean the magnet and then re-magnetize it. or take the idea and replace it with an electromagnet. I think the answer to the iron belt that you brought up would need to be thought into more but for now my answer is that you DON'T wear metal in said car. thank you for your input i will apply your thought to my ideas