Whemp, video doesn’t lie. I guess the first law of thermodynamics is wrong.
Lifehack for naive schoolchildren
Submitted 11 months ago by funny@lemmus.org to [deleted]
https://i.imgflip.com/8a7pll.gif
Comments
Excrubulent@slrpnk.net 11 months ago
jettrscga@lemmy.world 11 months ago
Well it is now.
First law of thermodynamics: You don’t talk about thermodynamics
Viking_Hippie@lemmy.world 11 months ago
Third law of thermodynamics: Someone yells stop, goes limp, taps out, the dynamic is over.
Fourth law of thermodynamics: Only two thermos to a dynamic.
Fifth law of thermodynamics: One dynamic at a time
Sixth law of thermodynamics: No shirts, no shoes
Seventh law of thermodynamics: dynamics will go on as long as they have to
Eighth law of thermodynamics; if this is your first thermo, you have to dynamic.
HolidayGreed@sh.itjust.works 11 months ago
Somebody should send this to Elon Musk.
RunningInRVA@lemmy.world 11 months ago
Who?
Octopus1348@lemy.lol 11 months ago
Why, I don’t get it.
Rizoid@programming.dev 11 months ago
I’m a big stupid and can come one smart explain why this doesn’t work in reality?
lsd@lemmy.world 11 months ago
The magnet is not pulling the car, the hand holding the magnet is pulling the car.
farfarawaay@sh.itjust.works 11 months ago
Okay. Maybe even dumb it down a little more? Just in case someone out there still doesn’t get it. Not me, I get it. Just someone else might not, and what about them you know?!
Jerkface@lemmy.world 11 months ago
I know a there are a lot of replies already, but I feel like the best way to explain is it’s similar to trying to push a car while you’re in it.
_danny@lemmy.world 11 months ago
I think this is the best answer. Just because magnetism is not visible doesn’t make it magic. The source of the forces doesn’t change where those forces go. A lot of these perpetual motion machines can be simplified to a situation that makes intuitive sense.
MystikIncarnate@lemmy.ca 11 months ago
Basically, as much as the magnet on the car is pushing it forward, the magnet on the stick is pulling it back and it doesn’t go anywhere.
Kase@lemmy.world 11 months ago
So, hypothetically, what if we replaced the magnet on the stick with a stronger magnet? (I’m sure this wouldn’t work, I just don’t know why it wouldn’t work lol)
niktemadur@lemmy.world 11 months ago
One magnet does not pull on the other, both are pulling on each other.
Sallp@lemmy.world 11 months ago
It is both pushing and pulling at the same time.
match@pawb.social 11 months ago
It doesn’t work because, while the front magnet is pulling the car magnet forward, the car magnet is also pulling the front magnet backwards and the front magnet is also attached to the car, so it cancels out.
Rentlar@lemmy.ca 11 months ago
In simplest terms, the two magnets are trying to pull toward each other equally. But when you glue them on the board, that glue holds the magnets apart, and “pushes” them the same amount that the magnets “pull” towards each other, hence no movement.
There would only be a movement if one side was pulling more than the other. The hand is providing that imbalance at first which moved the car.
Annoyed_Crabby@monyet.cc 11 months ago
Magnet want to pull and stick to each other of the different pole. When it glued to the car, the one on the cardboard will want to move toward the car and the one on the front hood will want to move toward the cardboard. The force cancel each other out so no movement will happen.
Johanno@lemmynsfw.com 11 months ago
Ok when not glued: both magnets get pulled to each other. The hand has to use some force in order to stay in place, so the car moves.
When glued: both magnets still get pulled to each other, but now the force is cancelled out since the force that would pull it forward also has to be used to hold the other in place.
Slow@lemmy.today 11 months ago
I think it’s the same as trying to give a sailboat acceleration by trying to blow the sails while standing on deck.
lemmefixdat4u@lemmy.world 11 months ago
Not quite the same as the two magnets. If you have a big fan and a square sail, you’re moving air, which has mass and is not attached to the boat. That alone will cause a force that moves the boat backwards. The moving air that hits the sail will not fully cancel that force due to frictional losses and air spillage from the edges.
Racing yachts are a different story. They have rigid sails that are shaped like airfoils. Blowing across an airfoil causes lift. So a big fan blowing perpendicular to the axis of the boat across such a sail would move the boat forward. But it’s much more efficient for the fan to blow backwards without the sail, hence airboats and hovercraft.
JohnSwanFromTheLough@lemmy.world 11 months ago
If you could scale the strength of blowing all the way up this would actually work though no?
hawgietonight@lemmy.world 11 months ago
In this situation the magnets act much like a spring, so imagine changing the magnets on the stick and the car for a simple spring. That is much more easier to visualize.
YoBuckStopsHere@lemmy.world 11 months ago
The magnets are not pulling it forward.
therealjcdenton@lemmy.zip 11 months ago
Cover yourself in oil
Seeker@infosec.pub 11 months ago
No one is commenting about the magnet on the back of the car and possibly a magnet in the person’s hand causing the rear magnet to repel against the hand magnet?
kittenzrulz123@lemmy.world 11 months ago
Oh yeah, it’s big brain time
LemmyKnowsBest@lemmy.world 11 months ago
[deleted]jenny_ball@lemmy.world 11 months ago
very funny though i love it
Annoyed_Crabby@monyet.cc 11 months ago
Man i miss troll physic.
idunnololz@lemmy.world 11 months ago
Bring back “Look around you”
Whelks_chance@lemmy.world 11 months ago
What are birds?
caseyweederman@lemmy.ca 11 months ago
New albumen! It’s out now!
Godric@lemmy.world 11 months ago
Image