this post was submitted on 04 Jul 2025
500 points (99.2% liked)

Memes

11194 readers
985 users here now

Post memes here.

A meme is an idea, behavior, or style that spreads by means of imitation from person to person within a culture and often carries symbolic meaning representing a particular phenomenon or theme.

An Internet meme or meme, is a cultural item that is spread via the Internet, often through social media platforms. The name is by the concept of memes proposed by Richard Dawkins in 1972. Internet memes can take various forms, such as images, videos, GIFs, and various other viral sensations.


Laittakaa meemejä tänne.

founded 2 years ago
MODERATORS
 
top 50 comments
sorted by: hot top controversial new old
[–] chunes@lemmy.world 9 points 1 day ago* (last edited 1 day ago)

When I was a kid I came up with this design during a long road trip. I spent the whole time thinking I was some kind of genius, because how didn't anyone else think of this before?

You can imagine my disappointment when I got home and created my prototype.

[–] Rooskie91@discuss.online 3 points 1 day ago

Equal AND opposite

[–] _AutumnMoon_@lemmy.blahaj.zone 20 points 2 days ago

Because you need to put it on the back and have it repel the truck forward instead of attract it forward obviously

[–] msprout@lemmy.world 110 points 3 days ago

Young lady, in this house, we obey the laws of thermodynamics!

[–] cholesterol@lemmy.world 14 points 2 days ago* (last edited 2 days ago) (1 children)

If you ever talk to someone confused by this, maybe ask them to lightly push the front magnet in the direction it's trying to go.

[–] TimewornTraveler@lemmy.dbzer0.com 5 points 1 day ago (1 children)

I tried that, nothing happened to the picture. why???

[–] beejboytyson@lemmy.world 3 points 1 day ago

Huh, try putting it next to the phone

[–] AdrianTheFrog@lemmy.world 6 points 2 days ago

This works in Kerbal Space Program

[–] pennomi@lemmy.world 45 points 3 days ago (2 children)

Did you try flipping the magnet over? If you put the two north ends together they’ll repel instead of attract.

[–] notarobot@lemmy.zip 11 points 3 days 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 10 points 3 days ago (1 children)

By your though process shouldn’t the car be going backwards?

[–] Endymion_Mallorn@kbin.melroy.org 12 points 3 days ago (2 children)

So mount it on the back and make yourself an old-fashioned rear engine car.

load more comments (2 replies)
[–] Kolanaki@pawb.social 19 points 3 days ago (6 children)

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.

[–] jnod4@lemmy.ca 3 points 1 day ago (1 children)

What if u put the fan in the water?

[–] FooBarrington@lemmy.world 2 points 1 day ago

There's oxygen in water, so it could work

[–] iAvicenna@lemmy.world 4 points 2 days ago* (last edited 2 days 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. In the end the air/water molecules literally get pushed behind so the rest of the system can move forward.

load more comments (4 replies)
[–] Ceruleum@lemmy.wtf 8 points 2 days ago

Needs more magnets and some springs.

[–] Diplomjodler3@lemmy.world 29 points 3 days ago (1 children)

I tried something like that when I was about ten.

[–] kubica@fedia.io 19 points 3 days ago

I still hold feelings against the force range being so short. Too close and the wire bends. Too far and there is barely any attraction...

Ugh, I just want to break physics, let me be.

[–] xploit@lemmy.world 20 points 3 days 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 18 points 3 days ago

Excellent! It is always nice to see people asking questions - the journey towards the answer should prove most enlightening! :-D

[–] MoonRaven@feddit.nl 16 points 3 days ago

The magnet isn't strong enough.

[–] dtrain@lemmy.world 12 points 3 days ago (1 children)
[–] theUwUhugger@lemmy.world 4 points 3 days ago* (last edited 3 days ago) (1 children)

Why would it? Think about it, would the two magnet gets closer if the wheels started rolling?

[–] KingPorkChop@lemmy.ca 12 points 3 days ago

Not with that attitude they won't.

[–] southsamurai@sh.itjust.works 12 points 3 days ago (15 children)

Need a bigger magnet.

Also, how do they work?

[–] Rhaedas@fedia.io 13 points 3 days ago (4 children)

Real, totally heavily simplified answer. All atoms could be magnets, but most don't have a force because the electron orbitals aren't out enough. In fact just about everything can be explained by what the electron orbitals are doing. Even why the chair you're sitting in feels solid. It's the orbitals. See Richard Feynman's bit on magnets and the deeper lesson on knowing the right questions to ask.

[–] bran_buckler@lemmy.world 4 points 3 days ago

I love listening to Richard Feynman talk in those interviews

load more comments (3 replies)
[–] RickyRigatoni@retrolemmy.com 8 points 3 days ago

they come from the ground so they have gravity in them

[–] Sprondar@lemmy.world 6 points 3 days ago
load more comments (12 replies)
[–] UltraMagnus0001@lemmy.world 7 points 3 days ago

Maybe it needs gas?

[–] thisbenzingring@lemmy.sdf.org 4 points 3 days ago (1 children)

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 10 points 3 days ago* (last edited 3 days ago) (2 children)

This is basically how a ~~rail cannon~~ coil gun 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.

What we need for true perpetual energy is to just capture that guy Blanka from Street Fighter.

[–] CarbonIceDragon@pawb.social 6 points 3 days ago* (last edited 3 days ago) (1 children)

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" (the rail), 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

[–] msprout@lemmy.world 5 points 3 days ago

Ah, I appreciate the correction. I'm not an engineer but the youngest cousin of a clan of them, so I just got the highlights of the true evil genius shit. :p

[–] prole@lemmy.blahaj.zone 1 points 2 days ago

What we need for true perpetual energy is to just capture that guy Blanka from Street Fighter.

Surely that dude has to eat a lot in order to produce so much energy, no? Or is it just all stored somewhere in his body?

load more comments
view more: next ›