Young lady, in this house, we obey the laws of thermodynamics!
Perpetual motion eludes us again.
Submitted 13 hours ago by The_Picard_Maneuver@lemmy.world to memes@sopuli.xyz
https://lemmy.world/pictrs/image/0414b43f-d913-4155-9ecb-47aba8d32cf3.jpeg
Comments
msprout@lemmy.world 12 hours ago
pennomi@lemmy.world 13 hours ago
Did you try flipping the magnet over? If you put the two north ends together they’ll repel instead of attract.
notarobot@lemmy.zip 8 hours ago
The beauty is that you can make the mental gymnastics to make it work both ways.
If they are opposite, the magnet attracts the car which moves the magnet away creating infinite motion
If they are the same, the magnet is repelled by the car, moving it away, moving the car forward creating infinite motion
You can even do mental tricks to make the contraption go backwards: Opposites: car attacks magnet which moves the car backwards Same: magnet reppels the car which moves the contraption backwards
theUwUhugger@lemmy.world 11 hours ago
By your though process shouldn’t the car be going backwards?
Diplomjodler3@lemmy.world 13 hours ago
I tried something like that when I was about ten.
Kolanaki@pawb.social 7 hours ago
It would work if the repulsion/attraction only went in 1 direction. But since it goes both ways, they just cancel out.
Conversely, the fan version of this idea (fan blowing into a sail) does actually work. But it’s nowhere near as efficient as simply turning the fan away from the sail to push you the normal way.
iAvicenna@lemmy.world 1 hour ago
Well because there the whole system now becomes the ship+air/water molecules rather than just the ship + you use energy to work the fan which imparts that energy to the air/water molecules.
psud@aussie.zone 4 hours ago
You think it would work if one end is a magnet and the other ferrous metal? I’m pretty certain it wouldn’t
Whatever happens there’s no work done as the magnet and it’s partner don’t move relative to each other. There’s force between them, but no movement.
Kolanaki@pawb.social 3 hours ago
You think it would work if one end is a magnet and the other ferrous metal?
No, because the force of attraction is still working in both directions just not as strongly as it would with two magnets.
xploit@lemmy.world 12 hours ago
The wire/metal holding it needs to be springy and bobbing back and forth to generate the momentum, duh… Half-assed implementation I say.
OpenStars@piefed.social 13 hours ago
Excellent! It is always nice to see people asking questions - the journey towards the answer should prove most enlightening! :-D
MoonRaven@feddit.nl 12 hours ago
The magnet isn’t strong enough.
UltraMagnus0001@lemmy.world 9 hours ago
Maybe it needs gas?
dtrain@lemmy.world 13 hours ago
“No srsly y isnt it?”
theUwUhugger@lemmy.world 11 hours ago
Why would it? Think about it, would the two magnets gets closer if the wheels started rolling?
KingPorkChop@lemmy.ca 9 hours ago
Not with that attitude they won’t.
southsamurai@sh.itjust.works 13 hours ago
Need a bigger magnet.
Also, how do they work?
RickyRigatoni@retrolemmy.com 13 hours ago
they come from the ground so they have gravity in them
theUwUhugger@lemmy.world 9 hours ago
I don’t think the other guy really explained it, its basically an atom with such a subatomic structure where the positive protons are capable of exerting stronger force on one side while the negative electrons on the other! The whole deposit is made up of atoms facing the same way!
Sprondar@lemmy.world 13 hours ago
Miracles
thisbenzingring@lemmy.sdf.org 12 hours ago
need two separate vehicles and two magnets, one weaker then the other
so the weaker one will repell the other and it will kick forward moving the other forward and rinse and repeat at a sonic speed
thats gotta generate some kinda motion
msprout@lemmy.world 12 hours ago
This is basically how a rail cannon works, just with electromagnets that can reverse their polarity.
It’s a powerful way to accelerate anything — I think it’s most famously used in those types of metal roller coasters that start you at a flat-with-the-ground angle, and then just fuckin launch you up a ramp to 45° with electromagnets. The issue is that you need a fuckton of energy to do that.
CarbonIceDragon@pawb.social 11 hours ago
That’s not how a railgun works, that’s how a coilgun works. Railguns create a loop of electric current that flows into one wire, through the projectile into the other wire, and back down to the starting point again, this configuration creates a force that pushes the projectile down the rails
finitebanjo@lemmy.world 1 hour ago
You could get something like this to generate thrust in theory, just not enough to move an object with this much mass and air resistance. It’s kind of similar to ionic propulsion.