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Checkmate, science (lemmy.world)
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[-] CarbonatedPastaSauce@lemmy.world 192 points 6 months ago

Because it makes the vehicle too long to park in the average garage or driveway.

[-] herrcaptain@lemmy.ca 52 points 6 months ago

Finally, an answer that makes sense.

[-] Ulvain@sh.itjust.works 128 points 6 months ago

What cracks me up is the piece of metal, labeled metal, attached to the one metric ton of... Metal

[-] RedditWanderer@lemmy.world 73 points 6 months ago

It's to differentiate from the trucks where the front is entirely made of very bring LEDs

[-] jose1324@lemmy.world 17 points 6 months ago

Cars these days are like 80% plastic crumble zone

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[-] Hupf@feddit.de 10 points 6 months ago

metric

You sure about that?

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[-] Matombo@lemmy.world 84 points 6 months ago

Fun at partys guy: While the car will actually experience a force torwards the magnet, so will the magnet experience an equal amount of force torwards tha car. Given the connection between the car and the magnet is stiff, these opposing forces will stress the connection and create a reactive force in there according to Newtens 3rd law, ultimatly canseling the forces out and neither the car nor the magnet will move.

If you however remove the stiff connection, the car and the magnet will move torwards each other untill they meet.

[-] affiliate@lemmy.world 10 points 6 months ago

what if you just attach a second magnet to the car so that it pulls the first magnet forwards?

[-] cynar@lemmy.world 23 points 6 months ago

Then you have the same mechanism used in toy wood trains.

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[-] credo@lemmy.world 81 points 6 months ago

It will, but why do you want the truck to attract the magnet? Are you going to drive backwards everywhere?

[-] walter_wiggles@lemmy.nz 22 points 6 months ago

This guy gets it

[-] regdog@lemmy.world 58 points 6 months ago

This illustration does not imply that the car is moving. There are no "speed lines" or arrows that would indicate that.

So the illustrated setup would 100% work.

[-] MonkderDritte@feddit.de 55 points 6 months ago

Try pulling yourself by the nose.

[-] 5in1k@lemm.ee 55 points 6 months ago

I hit 60mph and am like 20 miles from my house. Why would you tell me to do that?

[-] Hobo@lemmy.world 11 points 6 months ago

At least you didn't pull upwards like I did. Glad the ceiling was there or it could've been much worse.

[-] ShepherdPie@midwest.social 27 points 6 months ago

Or picking yourself up by your bootstraps.

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[-] AgentGrimstone@lemmy.world 15 points 6 months ago

It's working! I'm moving!

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[-] pleb_maximus@feddit.de 51 points 6 months ago

Good old troll physics.

W...wait, why is the troll head missing?!?

[-] nossaquesapao@lemmy.eco.br 22 points 6 months ago

Looks like people are (re)discovering troll physics

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[-] prime_number_314159@lemmy.world 34 points 6 months ago

I built a scale model to prove the haters wrong. I had to tilt the platform a little for it to overcome friction, but once I did, the car rolled forward until it hit a wall.

[-] Aurenkin@sh.itjust.works 34 points 6 months ago

So this would work actually but only for a brief second as the electrical current generated by the frame of the vehicle passing through the magnetic field would disrupt the flux conduction in the magnet. This is mostly due to being the way that it is.

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[-] kbal@fedia.io 29 points 6 months ago

Less fun at parties guy: While the diagram leaves it somewhat unclear as to what precise effect that mechanism is intended to achieve, clearly it involves electromagnetism and thus any proper explanation must begin with a full description of quantum field theory...

[-] Feathercrown@lemmy.world 27 points 6 months ago

What's funny is this would actually work if you just pointed the magnet at other people's cars.

[-] drislands@lemmy.world 8 points 6 months ago

"this would work if you did something completely different" lmao

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[-] snooggums@midwest.social 26 points 6 months ago

Because both of the magnet's poles are pointed at the car and the attraction and repulsion are canceling each other out.

[-] MentalEdge@sopuli.xyz 21 points 6 months ago* (last edited 6 months ago)

This is actually kind of how electric motors work as the rotor chases a magnetic field forever kept out of reach by the stator, and you can't tell me otherwise.

[-] FuglyDuck@lemmy.world 16 points 6 months ago

The difference is, that the rotor is allowed to move, and they’re switching coils in the stator to keep it going.

In this system, the force pulling the magnet towards the truck is being negated by the arm fixed to the truck.

If you placed a bunch of electromagnets on the guard rail, that would be more like a motor (technically, a linear motor,)

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[-] Mango@lemmy.world 21 points 6 months ago

The mount is holding the truck back. You need a wireless magnet.

[-] YeetPics@mander.xyz 20 points 6 months ago

Well, you used aluminum. Good work.

[-] PenisWenisGenius@lemmynsfw.com 19 points 6 months ago

The CIA puts backdoor code in all the magnets to prevent this from working. Source: trust me bro.

[-] RedCarCastle@aussie.zone 19 points 6 months ago

It's because the magnet is in the vertical position, it needs to be in the horizontal position to properly complete the circuit

[-] LemmyKnowsBest@lemmy.world 18 points 6 months ago

because the truck is self-propelled, and it can only go as fast as it takes itself. Therefore the magnet, which is attached to the truck, can only go as fast as the truck takes itself.

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[-] idunnololz@lemmy.world 17 points 6 months ago* (last edited 6 months ago)

It's actually a common misconception that magnets always attract metal. This misconception was popularized by people joking that magnets are magic. In reality, magnets attract because they have magnetions in them. These magnetions allow them to attract things like metal but a little bit is used up each time. Eventually once the magnet's magnetions have been depleted, the magnet turns back into a newt and goes home to recharge.

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[-] callyral@pawb.social 17 points 6 months ago

the car already has metal in it, so the metal block is unnecessary

[-] rickyrigatoni@lemm.ee 22 points 6 months ago

Adding more metal makes it go faster

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[-] Siethron@lemmy.world 14 points 6 months ago
[-] spizzat2@lemm.ee 9 points 6 months ago

It's cuz they got wet, isn't it?

[-] Draegur@lemm.ee 14 points 6 months ago* (last edited 6 months ago)

easy: the metal is pulling the magnet backwards and the magnet moving backwards is pushing the whole truck backwards through the arm.

(explaining things wrong is a fun hobby)

[-] mdurell@lemmy.world 13 points 6 months ago

Wile E Coyote has entered Lemmy.

[-] Arbiter@lemmy.world 11 points 6 months ago

Obviously you used a non ferrous metal.

[-] Rixster@lemmy.world 10 points 6 months ago

Go (back) to school

[-] Steelmonkey@lemmy.world 9 points 6 months ago

After hitting too many children the tires will get stuck.

[-] Venator@lemmy.nz 9 points 6 months ago* (last edited 6 months ago)

Why not just use rope instead of a magnet? You wouldn't need the extra metal on the front if you did that and would save weight.

[-] FiskFisk33@startrek.website 9 points 6 months ago

The large array of third party lighting fixtures exert photon pressure enough to cancel out the magnetic pull

[-] TachyonTele@lemm.ee 7 points 6 months ago

He knows too much

[-] UraniumBlazer@lemm.ee 7 points 6 months ago

Cuz Newton invented conservation of energy /s

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this post was submitted on 06 May 2024
385 points (92.3% liked)

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