Why don’t perpetual motion machines ever work? – Netta Schramm

Why don’t perpetual motion machines ever work? – Netta Schramm


Around 1159 A.D., a mathematician called
Bhaskara the Learned sketched a design for a wheel
containing curved reservoirs of mercury. He reasoned that as the wheels spun, the mercury would flow to the bottom
of each reservoir, leaving one side of the wheel
perpetually heavier than the other. The imbalance would keep
the wheel turning forever. Bhaskara’s drawing was one of
the earliest designs for a perpetual motion machine, a device that can do work indefinitely
without any external energy source. Imagine a windmill that produced
the breeze it needed to keep rotating. Or a lightbulb whose glow provided
its own electricity. These devices have captured many
inventors’ imaginations because they could transform
our relationship with energy. For example, if you could build
a perpetual motion machine that included humans as part of its
perfectly efficient system, it could sustain life indefinitely. There’s just one problem. They don’t work. Ideas for perpetual motion machines all violate one or more
fundamental laws of thermodynamics, the branch of physics that describes
the relationship between different forms of energy. The first law of thermodynamics says
that energy can’t be created or destroyed. You can’t get out more energy
than you put in. That rules out a useful
perpetual motion machine right away because a machine could only ever
produce as much energy as it consumed. There wouldn’t be any left over
to power a car or charge a phone. But what if you just wanted the machine
to keep itself moving? Inventors have proposed plenty of ideas. Several of these have been variations
on Bhaskara’s over-balanced wheel with rolling balls
or weights on swinging arms. None of them work. The moving parts that make one
side of the wheel heavier also shift its center of mass downward
below the axle. With a low center of mass, the wheel just swings back and forth
like a pendulum, then stops. What about a different approach? In the 17th century, Robert Boyle
came up with an idea for a self-watering pot. He theorized that capillary action, the attraction
between liquids and surfaces that pulls water through thin tubes, might keep the water cycling
around the bowl. But if the capillary action is strong
enough to overcome gravity and draw the water up, it would also prevent it from falling
back into the bowl. Then there are versions with magnets,
like this set of ramps. The ball is supposed to be pulled
upwards by the magnet at the top, fall back down through the hole, and repeat the cycle. This one fails because like
the self-watering pot, the magnet would simply hold
the ball at the top. Even if it somehow did keep moving, the magnet’s strength
would degrade over time and eventually stop working. For each of these machines to keep moving, they’d have to create some extra energy to nudge the system
past its stopping point, breaking the first law of thermodynamics. There are ones that seem to keep going, but in reality, they invariably turn out
to be drawing energy from some external source. Even if engineers could
somehow design a machine that didn’t violate the first law
of thermodynamics, it still wouldn’t work in the real world
because of the second law. The second law of thermodynamics tells us that energy tends to spread out
through processes like friction. Any real machine would have moving parts or interactions with air
or liquid molecules that would generate tiny amounts
of friction and heat, even in a vacuum. That heat is energy escaping, and it would keep leeching out, reducing the energy available
to move the system itself until the machine inevitably stopped. So far, these two laws of thermodynamics have stymied every idea
for perpetual motion and the dreams of perfectly efficient
energy generation they imply. Yet it’s hard to conclusively say we’ll
never discover a perpetual motion machine because there’s still so much we don’t
understand about the universe. Perhaps we’ll find
new exotic forms of matter that’ll force us to revisit the laws
of thermodynamics. Or maybe there’s perpetual motion
on tiny quantum scales. What we can be reasonably sure about
is that we’ll never stop looking. For now, the one thing that seems
truly perpetual is our search.

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100 thoughts on “Why don’t perpetual motion machines ever work? – Netta Schramm

  1. So I dont know if anyone will read this and I couldnt find anything online but could torque be the answer? the ammount of energy created from torque is greater via distance, just how bold cutters work, you're able to break steel from a padlock with just two wrenches exerting force on eachother with barely any effort. Perhaps we could find a way to allow torque to lift a great ammount of weight (water for example) to create kinetic, thoughts?

  2. That's weird, could have sworn the earth keeps rotating. Would have made more sense to state it doesn't work where friction exists.

  3. Till watching this video I was always thinking why couldn't the scientists use this kind of machines for infinite energy supply for us

  4. I don't get anyway why English speakers can't utter an Indian or a Bangladeshi name, though they can pronounce the French, Latin or Greek name well!

  5. Human reproduction is perpetual motion on a world wide scale. That wheel started cranking out kids since Adam and Eve thousands of years ago and I see no sign of stopping. Crime is perpetual motion. Every since Cain bopped Abel in the head, crime was set into motion and it will never stop completely. Remember perpetual motion does not have to be a single unit. It can be a collective series of units working together to perform a single task powered by a primary energy sources….the sun. Propetual motion need only last for your lifetime which makes it prepetual to you because after you're dead, you won't know if it ever stopped. The last rule of Thermodynamics is (you can't make a device that works forever on its own power) because "no machine made by man can last forever in the first place… prepetual or not."

  6. We conclude from this… because the universe is moving forawrd in time and not diying mean it needs an external source of energie to keep it the way it is

  7. Si aplicamos las mismas reglas de termodinámica de las máquinas de movimiento perpetuo, al universo, llegaremos a la conclusión de que el universo, como energía, está en expansión, y al estar en expansión, quiere decir que eventualmente esta energía se agotará y por ende se acabará la existencia. Lo que significa un universo finito. Sin embargo, si demostramos que el universo no está en expansión, sino que existen niveles de dimensiones superiores al que conocemos, y que el universo se encuentra en un eterno ciclo, entonces, cabe la posibilidad de crear estas máquina de movimiento perpetuo, y si descubrimos la forma de crear estas máquinas, quiere decir que los humanos podrán crear sus propios universos convirtiéndose en dioses.

  8. Nice oxford university press book about working pepeetum engines from 1995 https://www.amazon.com/Permanent-Magnet-MONOGRAPHS-ELECTRICAL-ELECTRONIC-ENGINEERING/dp/0198593899/ref=mp_s_a_1_27?keywords=magnet+motor&qid=1567671873&s=gateway&sprefix=magnet+motor&sr=8-27

  9. one has to eliminate all 11 other fields of physics to applied object…leaving the one field…switching on and off… yeah its that easy sweetie!

  10. The oceans are good enough for a perpetual motion machine. They "do work indefinitely". I haven't noticed them stopping their motion lately.

  11. That is invented already, it is all around us. It could be called PW4R machine (poor works for rich) 🤣
    To ensure working, machine is protected by varios invented laws and making revolutions to stop it is usually prohibited 😂

  12. 5:03 no, the moon going around the earth and the earth going around the sun we can be sure about. (I know someone is going to say in a billion years the planets will stop orbiting or something like that )

  13. Well… if you could isolate this machine from outside, theoretically perpetual machine would be possible. But we wouldn't see it, touch it, or in any way affect it.
    Also, I read some interesting article that talked about beginning of this universe. It hypothesized that by adding all mass of this universe to a single point and as gravity affects that point, energy would build up. It would build up till enough energy is gathered for it to "explode" outwards. I don't know how realistic it is, but given that it is possible that total energy of universe is 0 and in closed systems amount of energy is unchanging, it could be that our universe is perpetual motion machine.

  14. Yes. You can. There are two ways to make it.
    1-Direct way. You give X amount and you get out more than what you put in. Not a huge amount, but more than you put in. It is not a huge amount, but you get more and It is expensive. I have tried and I can prove it.
    2-Indirect way. It is very easy, a huge difference between what you put in and what you get out. It is very simple and very inexpensive. This is the answer to the energy problem. You can get out unlimited energy.
    Exp.Say We put 5 MW energy. We can create whatever you need, say 10 million MW or 5 Trillion MW energy.
    Just one source can provide enough energy for the whole world.I call this "Multiplying Energy ".
    E4aBW- Energy 4 a Better World. It is simple, clean, green, safe, unlimited and FREE ENERGY>
    E4aBW. We should bring Electricity and clean water to every house in the world. My question is.
    Are you going to support this energy ?. No oil,gas,nuke,sun,wind,water, coal,biofuel/gas.,etc…

  15. to bet perpetual to work you have to break the conservation laws. in perpetual the definition is to break the conservation of energy law. think about this. the machines' definition is that the conversation laws are broken. the question is all about the conservation laws but in the human quality of believing in something because of hope and/or ego massaging.

  16. BEFORE I watch the video, let me state this; NO, because of 1.- Gravity, 2.- The laws about how energy is regulated, 3.- ENTROPY! (friction) If such a thing as a "perpetual motion machine" was at ALL possible, the Universe would accelerate, faster and faster and faster, careening OUT OF CONTROL! Entropy and it's twin brother, Time, are the Universal regulators, that's why things happen in sequence and not all at once! Entropy and Time are NOT our bane, they're our friends!

  17. why should anything move … the most stable and energy efficient is .. being in rest . nature knows this . humans don't … because of ego that wants to experience trough its senses …

  18. Here in the philippines we have countryman invented a fan no need electricity or battery https://news.abs-cbn.com/video/life/01/14/18/taga-kumpuni-ng-relo-nakaimbento-ng-bentilador-na-hindi-kailangan-ng-kuryente-o-baterya

  19. Flat-Earthers, Chem Trail believers, and other conspiracy nuts: "This video is yet another attempt by greedy governments and oil corporations to stop technological progress and destroy hope in perpetual motion machines. When (not if) we finally achieve perpetual motion, those greedy corporations and governments will lose all their power and money. It's all about power and money, like always. So to keep it they ridicule, suppress, and will even kill anyone who invents a working perpetual motion machine. That's the only reason we don't already have it as an every-day thing like cars and smart phones."

  20. Intuitively, these 'perpetual motion' machines don't seem to make any sense because you get an infinite supply of free energy – eventually you will use up all the energy in the universe if you try to power a 'perpetual motion' machine forever it would seem.

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