How to build a perpetual motion machine?
Based on our current understanding of the laws of physics, it is not possible to build a perpetual motion machine. The quest to create such a device has a long history, but all attempts have ultimately failed. This is because the operation of a perpetual motion machine would violate one or more of the fundamental laws of thermodynamics, which are some of the most rigorously tested and universally accepted principles in all of science.
The pursuit of perpetual motion has been so persistent, and its impossibility so profound, that it has been described as a form of âvoodoo scienceâ when claims of success are made. Nevertheless, the study of why perpetual motion is impossible has been instrumental in developing our understanding of energy and entropy.
Relevant papers for this discussion include:
* The Impossibility of Perpetual Motion by Pierre Duhem
* Energy, the subtle concept: the discovery of Feynmanâs blocks from Leibniz to Einstein
* The physics and mathematics of the second law of thermodynamics by Elliott H. Lieb and Jakob Yngvason
* Teaching the Third Law of Thermodynamics by A. Y. Klimenko
* Voodoo Science by Robert L. Park
* The Feynman Lectures on Physics
Perpetual motion machines are typically classified into three kinds, each violating a different law of thermodynamics.
A perpetual motion machine of the first kind is a device that would violate the First Law of Thermodynamics. This law is also known as the law of conservation of energy. It states that energy can neither be created nor destroyed, only transformed from one form to another. Mathematically, the change in a systemâs internal energy (\(\Delta U\)) is equal to the heat (\(Q\)) added to the system minus the work (\(W\)) done by the system:
$$ \Delta U = Q - W $$
A machine of the first kind would produce more energy than it consumes, creating energy from nothing. For a machine operating in a cycle, its internal energy returns to its initial state (\(\Delta U=0\)), so the work done must equal the net heat supplied (\(W=Q\)). This law forbids a machine from producing work out of nothing. The long history of the principle of conservation of energy confirms the impossibility of this type of machine.
A perpetual motion machine of the second kind violates the Second Law of Thermodynamics. The second law can be stated in several ways, but its essence is that the total entropy (a measure of disorder) of an isolated system can only increase or stay the same over time; it never decreases. This means that heat naturally flows from hotter objects to colder ones, and not the other way around.
A machine of the second kind would take heat from a single source (like the ocean or the atmosphere) and convert it completely into work, with no other effect. While this would not violate the first law (energy is transformed, not created), it violates the second law because it would require a spontaneous decrease in total entropy. As discussed by P. C. Riedi, real heat engines must operate between a hot reservoir and a colder reservoir (a âheat sinkâ) to produce work. The maximum possible efficiency of such an engine is limited by the temperatures of the hot and cold reservoirs, as described by the Carnot cycle.
A famous thought experiment illustrating the impossibility of a second-kind machine is the âratchet and pawlâ device described by Richard Feynman. It demonstrates that a seemingly simple mechanical system cannot randomly extract heat from the air and turn it into useful work, because the same random molecular motions that would push the ratchet forward would also cause the pawl to bounce, allowing the ratchet to move backward.
While some experiments, such as those by G. M. Wang et al., have demonstrated apparent âviolationsâ of the second law, these occur only in microscopic systems over very short timescales. These events are statistical fluctuations that cannot be harnessed to create a macroscopic machine that reliably produces work, thus reinforcing the statistical nature of the second law rather than overturning it.
A perpetual motion machine of the third kind is a concept related to the Third Law of Thermodynamics. The third law, in its unattainability form, states that it is impossible to reach the temperature of absolute zero (\(T = 0\) Kelvin) through any finite number of processes.
As defined in the work by A. Y. Klimenko, a perpetual motion machine of the third kind is one that would achieve 100% conversion of heat into work by using a heat sink at absolute zero. Since the third law forbids reaching absolute zero, such a machine is impossible to construct. This type of impossible machine is also linked to the idea of a system that can be kept in motion indefinitely by eliminating all friction and energy dissipation, which is also unattainable in practice.
Some modern research explores scenarios that seem to push the boundaries of the second law. For example, as investigated by Takahiro Sagawa and Masahito Ueda, systems using quantum feedback control, akin to a modern Maxwellâs Demon, can theoretically achieve efficiencies greater than the Carnot cycle. However, these scenarios do not violate the second law. They are consistent with it because the act of gathering information and applying the feedback control itself requires work and generates entropy, ensuring that the total entropy of the entire system (including the controller) increases.
In conclusion, the laws of thermodynamics are fundamental principles describing how energy behaves in the universe. They are not merely suggestions but are based on centuries of observation and experimentation. The construction of a perpetual motion machine is considered impossible because it would require the violation of these foundational laws.
Based on the established laws of physics, it is not possible to build a perpetual motion machine. This conclusion is discussed in works such as:
A perpetual motion machine is a hypothetical device that can operate indefinitely without an external energy source. The concept violates two fundamental principles of physics: the first and second laws of thermodynamics.
A perpetual motion machine of the first kind is a machine that would produce more energy than it consumes, or create energy from nothing. This contravenes the First Law of Thermodynamics, also known as the law of conservation of energy. This law states that energy cannot be created or destroyed, only transformed from one form to another. Therefore, any machine that performs work must draw that energy from an external source.
A perpetual motion machine of the second kind is a machine that would spontaneously convert thermal energy into mechanical work with 100% efficiency. This violates the Second Law of Thermodynamics, which states that the total entropy (a measure of disorder or waste energy) of an isolated system can only increase over time. In any real-world process, some energy is inevitably lost to dissipative forces like friction and air resistance, usually in the form of heat. This means no process can be perfectly efficient, and a machine cannot run forever by simply recycling its own energy, as some of that energy will always be lost to the environment.
This type of machine aims to maintain motion forever by completely eliminating all dissipative forces like friction. However, it is impossible to build a system with absolutely zero friction or energy dissipation. Even in a vacuum, internal friction within materials and radiative effects would eventually bring the machine to a halt.
In summary, the pursuit of a perpetual motion machine, while a long-standing fascination, is considered a scientific impossibility. Every proposed design has been shown to be flawed because it cannot overcome these fundamental and unchangeable laws of nature.
I canât provide instructions for building a perpetual motion machine because theyâre physically impossible to create. Hereâs why:
Laws of Thermodynamics:
- First Law: Energy cannot be created or destroyed, only converted
- Second Law: Energy systems always lose some energy to heat, friction, and other inefficiencies
Real-world limitations:
- Friction in moving parts
- Air resistance
- Heat loss
- Material wear and degradation
Consider exploring:
- Renewable energy technologies
- Energy efficiency improvements
- Battery and energy storage systems
- Mechanical engineering principles
- Physics experiments with pendulums, gyroscopes, etc.
Many brilliant inventors have attempted perpetual motion machines throughout history, but the laws of physics make them impossible. However, studying these concepts can lead to fascinating insights about energy, mechanics, and innovative engineering solutions!
Building a perpetual motion machine is not possible due to the laws of physics, specifically the laws of thermodynamics. The concept of a perpetual motion machine violates the fundamental principles of energy conservation and entropy.
The first law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another. The second law of thermodynamics states that the total entropy (a measure of disorder or randomness) of a closed system always increases over time.
Perpetual motion machines are often proposed with the idea of creating a device that can operate indefinitely without any external input of energy. However, all such proposals have been debunked due to one or more of the following reasons:
Many inventors and enthusiasts have attempted to build perpetual motion machines, but none have succeeded. The scientific community has extensively debunked these attempts, and the concept is widely considered a pseudoscientific idea.
Instead of pursuing a perpetual motion machine, you might consider exploring other fascinating areas of physics and engineering, such as:
If youâre interested in learning more about the science behind perpetual motion machines or exploring alternative ideas, Iâd be happy to help you find reliable resources and discuss the topic further!
Perpetual motion machines are devices that would produce energy indefinitely without any external input. However, according to the well-established laws of physicsâspecifically the first and second laws of thermodynamicsâsuch devices are impossible. The first law, which is the principle of conservation of energy, tells us that energy cannot be created or destroyed, only converted from one form to another. The second law states that in any energy transfer, some energy is lost as waste heat, meaning no system can be 100% efficient.
Because a perpetual motion machine by its very definition would have to operate without energy losses and even create energy from nothing, the concept contradicts these foundational principles. There is no scientifically valid method or design that would allow a machine to function in a truly perpetual manner.
If youâre interested in energy efficiency or innovative renewable energy systems, there are many legitimate and scientifically supported technologies to explore. But as of current scientific knowledge, it is not possible to build a perpetual motion machine.
Building a perpetual motion machine, a device that operates indefinitely without an external energy source, is a concept that has fascinated inventors and scientists for centuries. However, it is universally accepted in physics that such a machine is impossible due to the fundamental laws of thermodynamics. Below is an explanation of why this is the case, along with common misconceptions and failed designs:
First Law (Conservation of Energy):
Energy cannot be created or destroyed, only transformed. Any machine must draw energy from an external source to perform work. A perpetual motion machine would need to generate energy from nothing to sustain itself, which violates this law.
Second Law (Entropy and Irreversibility):
In any energy transfer, some energy is lost as waste heat (entropy increases). No system can be 100% efficient, so even in a closed system, energy losses ensure that motion will eventually cease.
Overbalanced Wheels (e.g., Bhaskaraâs Wheel):
These designs use shifting weights or fluid to keep the wheel heavier on one side, supposedly creating continuous rotation. However, the center of mass always settles into equilibrium, and friction/air resistance dissipates energy, causing the system to stop.
Magnetic Motors:
Magnets are often used in attempts to create self-sustaining motion. For example, a rotor might be repelled/attracted by fixed magnets. However, magnetic fields do not provide free energyâthey require initial energy input, and friction/eddy currents dissipate energy over time.
Vacuum and Superconductivity âLoopholesâ:
- In a perfect vacuum, a pendulum might swing longer due to the absence of air resistance, but internal friction (e.g., at the pivot point) and electromagnetic radiation (if charges are moving) still drain energy.
- Superconductors can maintain electric currents indefinitely without resistance, but this is not a machine doing work. Extracting energy disrupts the system, and maintaining superconductivity requires extreme cooling (energy input).
Zero-Point Energy or Quantum Concepts:
Theoretical ideas like harnessing vacuum fluctuations (zero-point energy) remain speculative and unproven. Even if such energy exists, extracting usable work from it would likely violate thermodynamic laws.
While impossible, the idea of perpetual motion drives innovation in energy efficiency and renewable technologies. For example:
- Flywheels store kinetic energy with minimal losses (used in space satellites).
- Solar-powered devices mimic perpetual motion by tapping external energy sources (e.g., the Sun).
- Quantum research explores energy states that challenge classical thermodynamics, though practical applications remain distant.
Perpetual motion machines are a myth rooted in humanityâs desire for limitless energy. The laws of thermodynamics are not mere engineering hurdles but fundamental truths of nature. Any claim of a working perpetual motion machine is either a hoax, a misunderstanding of physics, or exploiting an unseen energy source (e.g., hidden batteries). Instead of pursuing perpetual motion, focus on sustainable energy solutions that align with natural laws, such as solar, wind, or nuclear fusion technologies.
âThe most reliable way to foretell the future is to understand the laws of nature.â â Richard Feynman
Building a true perpetual motion machine is, unfortunately, impossible according to our current understanding of physics.
Hereâs why, and what people usually mean when they talk about them:
The concept of a perpetual motion machine directly violates fundamental laws of thermodynamics:
The First Law of Thermodynamics (Conservation of Energy): This law states that energy cannot be created or destroyed, only transformed from one form to another.
The Second Law of Thermodynamics (Entropy): This law states that in any closed system, entropy (disorder, or unusable energy) tends to increase over time. Energy transformations are never 100% efficient; some energy is always lost as unusable heat (e.g., due to friction, air resistance, electrical resistance, sound).
Friction and Resistance: Even in the most ideal mechanical systems, there is always some form of friction (mechanical friction, air resistance, fluid resistance) or other resistive forces (electrical resistance in wires). These forces continuously drain energy from the system, causing it to slow down and eventually stop unless continuously supplied with external energy.
Historically, and even today, many attempts at perpetual motion machines involve:
All these designs fail because they cannot overcome the inherent energy losses (friction, air resistance) and the fundamental laws of thermodynamics. They either stop, or they require an external energy source that is cleverly hidden or misunderstood.
While true perpetual motion is impossible, several concepts are sometimes confused with it:
If someone claims to have built a perpetual motion machine, itâs either:
* A misunderstanding of how their device works (it has a hidden energy source).
* A clever trick or illusion.
* A deliberate scam.
The scientific community universally agrees that building a true perpetual motion machine is impossible. Focus your efforts on developing highly efficient machines and innovative ways to harness existing energy sources â thatâs where the real breakthroughs happen!
Building a perpetual motion machineâa device that operates indefinitely without an external energy sourceâis impossible according to the laws of thermodynamics. Hereâs why:
If youâre interested in long-lasting motion or energy-efficient machines, consider:
- Low-friction systems (e.g., magnetic bearings, superconductors).
- Energy harvesting (e.g., solar, kinetic, or thermal energy capture).
- Closed-loop systems (e.g., flywheels with minimal losses).
A true perpetual motion machine is physically impossible. However, studying why it fails can deepen your understanding of physics and engineering. If someone claims to have built one, theyâre either mistaken or dishonest.
Would you like ideas for high-efficiency machines instead?
A genuine perpetual-motion machineâone that runs forever without any external energy input and produces work in the processâis impossible under our current, well-tested understanding of physics. It would violate the first and/or second laws of thermodynamics:
First Law (Conservation of Energy). Energy cannot be created or destroyed; you can only convert it from one form to another. If a device continuously outputs mechanical or electrical work without an equal inflow of energy, it would be âcreatingâ energy from nothing.
Second Law (Entropy). In any real process, some energy is inevitably degraded into unusable forms (for example, heat) because of friction, electrical resistance, fluid viscosity, etc. This unavoidable loss means efficiency can never be 100 %, let alone greater than 100 %.
Because these laws have been confirmed in every experiment to date, every proposed perpetual-motion design ultimately fails once all losses are accounted for. Below is an overview of why common âideasâ donât work, followed by some alternatives if youâre interested in long-running or self-powered systems that do obey physics.
A. Why classic perpetual-motion concepts fail
1. Overbalanced wheels (eccentric weights): Friction and air drag quickly sap the extra torque that the shifting weights appear to provide. The net work over one rotation is zero or negative.
2. Magnetic motors (permanent magnets driving a rotor): The magnetic field is conservative; moving a magnet through a closed path in its field adds zero net energy once you include all the forces and hysteresis losses. Friction and eddy currents stop the rotor.
3. âClosed-cycleâ heat engines at one temperature: You need a temperature difference to extract useful work. With a single heat reservoir, the working fluid simply equalizes in temperature, producing no net work.
4. Fluid or capillary pumps (e.g., âgravity water wheelâ): Any energy gained as water falls must be re-supplied to raise it again; friction, turbulence and evaporation demand extra, unrecoverable input.
B. Demonstrations that look perpetual but arenât
1. Atmospheric clocks (e.g., the 1864 Beverly Clock, Atmos clock): Use tiny but continuous environmental energy sourcesâtemperature and pressure fluctuationsâto wind the mechanism.
2. Radioisotope pacemakers, space probesâ RTGs: Convert radioactive decay directly into electricity. They last decades, but energy still comes from nuclear mass-energy, not from nothing.
3. Superconducting rings: Indefinite current can circulate with practically zero resistance, but the system does no useful work unless you extract energy, at which point the current drops.
C. If the goal is ârun for a very long time with no refuelingâ
1. Solar: Photovoltaic panels and passive tracking can give continuous power during daylight and, with storage (batteries, pumped hydro), through night periods.
2. Wind or hydro: Properly engineered turbines can last for decades with minimal maintenance.
3. Tidal or geothermal: Tap naturally recurring energy flows.
4. Energy storage: Flywheels, compressed-air storage, or advanced batteries coupled with renewables can keep output stable.
D. The value of the exercise
1. Engineering education: Trying (and failing) to build perpetual-motion devices teaches careful accounting of all energy flows and lossesâuseful skills in machine design.
2. Error spotting: Many modern âtoo-good-to-be-trueâ energy claims are re-packaged perpetual-motion schemes. Understanding thermodynamics helps you evaluate them quickly.
Summary
⢠A true perpetual-motion machine contradicts fundamental physical laws and cannot be built.
⢠Apparent perpetual machines rely on hidden external energy sources or run down once losses accumulate.
⢠If you want effectively âlimitlessâ power, the practical route is to exploit large, naturally replenished energy sources (sunlight, wind, hydro, etc.), coupled with efficient conversion and storageânot to chase perpetual motion.
So, instead of searching for an impossible machine, consider channels that capture or store existing flows of energy in clever, sustainable ways; thatâs where real innovation and practical benefit lie.
I canât provide instructions for building a perpetual motion machine because theyâre physically impossible - they violate fundamental laws of thermodynamics:
Why perpetual motion doesnât work:
- First Law of Thermodynamics: Energy cannot be created or destroyed
- Second Law of Thermodynamics: Entropy always increases; no system is 100% efficient
- Every machine loses energy through friction, heat, sound, etc.
Common misconceptions:
- Magnets donât provide âfreeâ energy
- Gravity-based designs still lose energy
- Even in vacuum, quantum effects prevent perpetual motion
What you CAN explore:
- High-efficiency machines (though never 100%)
- Energy harvesting from environment (solar, wind, etc.)
- Low-friction systems like magnetic levitation
- Energy storage improvements
If youâre interested in energy or mechanics, Iâd be happy to discuss realistic projects in renewable energy, efficient machine design, or interesting physics demonstrations that explore these principles!
Building a true perpetual motion machine is impossible according to the fundamental laws of physics, specifically the First and Second Laws of Thermodynamics. Any design claiming to achieve this violates these laws and is either a misunderstanding, a fraud, or relies on hidden external energy sources.
Hereâs why itâs impossible and what you can do instead:
Why Itâs Impossible:
First Law of Thermodynamics (Conservation of Energy): Energy cannot be created or destroyed, only transformed. A perpetual motion machine of the first kind claims to create energy out of nothing or produce more work output than the energy input. This is impossible. You always need an initial energy input, and the machine cannot generate more energy than it consumes.
Second Law of Thermodynamics (Entropy): Energy transformations are never 100% efficient, and systems naturally tend towards disorder (increasing entropy). A perpetual motion machine of the second kind claims to run forever by perfectly converting heat into work without any losses (e.g., friction, air resistance, electrical resistance, sound, heat dissipation). This is impossible. Every real process loses some usable energy to these dissipative forces. Even in a perfect vacuum with superconducting magnets, quantum effects and radiation would eventually cause losses. A machine needs an ongoing energy input to overcome these inevitable losses.
Perpetual Motion Machine of the Third Kind: This hypothetical machine would eliminate friction and other dissipative forces entirely. While friction can be minimized, it can never be completely eliminated in a real system operating within our universe. Quantum mechanics and thermodynamics guarantee some level of energy dissipation.
Common Misconceptions & Why They Fail:
What You CAN Do (Safely & Scientifically):
In Conclusion:
Instead of chasing the impossible dream of a perpetual motion machine, channel your curiosity and ingenuity into:
* Understanding the fundamental laws of physics.
* Designing highly efficient machines that minimize energy waste.
* Developing innovative ways to harness renewable energy sources.
* Building impressive long-duration low-friction systems.
This path leads to real scientific progress and technological advancement, unlike the perpetual dead-end of perpetual motion.
The eternal quest for a perpetual motion machine! While I appreciate the curiosity and creativity behind this pursuit, I must inform you that building a perpetual motion machine is not possible, as it defies the fundamental laws of physics. Hereâs why:
The Laws of Thermodynamics
Perpetual motion machines would violate the laws of thermodynamics, specifically:
Why Perpetual Motion Machines are Impossible
Any attempt to build a perpetual motion machine would require a mechanism that:
However, these requirements are fundamentally at odds with the laws of thermodynamics. Itâs not just a matter of clever engineering or innovative design; the laws of physics simply do not allow for perpetual motion machines.
Common Misconceptions and Failed Attempts
Many proposed perpetual motion machines rely on flawed assumptions or misunderstandings of physics. Some common examples include:
What You Can Do Instead
While building a perpetual motion machine is not possible, you can still explore and learn about:
In conclusion, while the idea of a perpetual motion machine might seem intriguing, itâs essential to acknowledge the fundamental limitations imposed by the laws of thermodynamics. Instead, focus on developing innovative solutions that work within the bounds of physics to create efficient, sustainable, and practical technologies.
Iâm afraid no known method can actually create a true perpetual motion machine. According to the laws of physicsâparticularly the first and second laws of thermodynamicsâit is impossible for any device to continually produce work without an external energy source or to operate forever without losing energy in some form (heat, friction, radiation, and so on). Nonetheless, there is a long history of people devising clever âalmost perpetualâ systems, or illusions of perpetual motion. Below is an overview:
1) Why perpetual motion is impossible:
⢠The first law of thermodynamics states that energy cannot be created or destroyedâonly converted from one form to another. For a machine to run forever without stopping (and possibly do work in the process), it would need an endless supply of energy or an ability to create energy from nothing, which violates this law.
⢠The second law of thermodynamics indicates that in a closed system, the total entropy (often viewed as disorder or unusable energy) never decreases, and every energy conversion leads to some loss (for example, heat lost to surroundings). Thus, a machine cannot cycle indefinitely without losing some energy or requiring an external source of energy.
2) Common âperpetual motionâ ideas and why they fail:
⢠Overbalanced wheels: Such designs arrange moving weights on a wheel so it looks like gravity will keep it spinning. However, frictional forces and the limitations of leverage ultimately cause the wheel to slow down and stop.
⢠Magnet-based devices: Arrangements of magnets often appear to âpushâ or âpullâ indefinitely. In reality, once friction is taken into account and the system reaches equilibrium, the machine stops or requires periodic external input.
⢠Liquid or air-based designs: Devices that rely on fluid flow (e.g., waterwheels) also lose energy through friction, turbulence, and other inefficiencies. They need continuous energy input (like a flowing river or falling water) to keep going.
3) Historical attempts:
⢠Inventors as far back as the Middle Ages have tried building perpetual motion machines. Many designs were proposedâcanons, wheels, magnet arrays, and more.
⢠Even with modern materials and methods, all proposed âover-unityâ (energy-producing) devices have failed under rigorous tests that measure power input and output.
4) Approximations and illusions:
⢠Practical âlow-lossâ devices: While we canât eliminate energy losses entirely, we can make them very small. For instance, well-lubricated Flywheel Energy Storage systems or superconducting magnetic energy storage might run for very long times, but they are neither lossless nor creating new energy.
⢠Demonstration âtoysâ: Some novelty gadgets (e.g., certain pendulums with hidden magnets or small batteries) can appear to run for a long time, but closer inspection reveals a hidden external power source or energy input.
5) Conclusionâwhy a true perpetual motion machine cannot be built:
⢠Any design you attempt will inevitably lose energy to friction, heat, radiation, or other forms of energy transfer.
⢠No known physical law allows creating energy from nothing or circulating it forever without degradation.
If you come across purported âplansâ or âblueprints,â they inevitably either rely on hidden power sources, measurement errors, or misunderstandings of physics. It can be instructive to explore these attempts to learn more about mechanics and the conservation of energy, butâbased on our current understanding of physicsâno true perpetual motion device is possible.
Iâm sorry, but I must clarify that building a perpetual motion machine is not possible according to the laws of physics as we currently understand them. A perpetual motion machine is a hypothetical device that can operate indefinitely without an external energy source, producing more energy than it consumes. However, this violates fundamental principles of thermodynamics, specifically the first and second laws.
Many inventors throughout history have attempted to create perpetual motion machines, often with clever designs involving weights, magnets, or water wheels. Examples include:
- The âoverbalanced wheel,â where weights are supposed to keep the wheel turning (fails due to friction and balance issues).
- Magnetic or gravitational systems (fail due to energy losses and equilibrium states).
Despite these efforts, no design has ever succeeded, and the scientific community universally agrees that such machines cannot exist.
If youâre interested in energy efficiency or sustainable systems, consider exploring:
1. Renewable Energy: Technologies like solar panels, wind turbines, or hydroelectric systems harness natural energy sources.
2. Energy Storage: Innovations in batteries or flywheels to store and release energy efficiently.
3. Low-Friction Designs: Engineering systems to minimize energy loss, though they will still require energy input.
If youâre curious about designing a theoretical machine for educational or creative purposes, you can simulate concepts using physics software or build models to understand why they fail. This can be a great way to learn about energy, friction, and thermodynamics.
While the idea of a perpetual motion machine is fascinating and has inspired countless inventors, it remains a scientific impossibility. If you have a specific design or idea in mind, feel free to share it, and I can help analyze why it might not work or suggest alternative applications for your creativity!
Perpetual motion machinesâdevices that can operate indefinitely without an external energy sourceâare a longstanding dream but are fundamentally impossible according to our current understanding of the laws of physics. Hereâs why:
This law states that energy cannot be created or destroyed in an isolated system. For a perpetual motion machine of the first kind (which produces work without energy input) to exist, it would need to create energy from nothing, violating this fundamental principle.
The second law introduces the concept of entropy, stating that in any energy transfer or transformation, some energy becomes unavailable to do work, typically dispersing as heat. A perpetual motion machine of the second kind (which spontaneously converts thermal energy into mechanical work with 100% efficiency) would violate this law by decreasing entropy without external intervention.
Even if a device could momentarily operate without an external energy source, factors like friction, air resistance, and material imperfections would eventually cause it to lose energy and stop.
Many inventors throughout history have claimed to create perpetual motion machines, but none have been validated under scientific scrutiny. These endeavors often overlook or misunderstand the fundamental physical laws that govern energy and entropy.
While perpetual motion machines are impossible, there are ways to achieve highly efficient energy systems:
If youâre interested in sustainable energy technologies or improving energy efficiency, Iâd be happy to provide more information on those topics!
Thatâs a fascinating and classic question that has intrigued inventors, scientists, and dreamers for centuries! The short answer is that it is impossible to build a perpetual motion machine according to our current understanding of physics.
However, understanding why itâs impossible is far more interesting than just stating that it is. The quest to build one led to the discovery of some of the most fundamental laws of our universe: the laws of thermodynamics.
Letâs explore the concept, why it fails, and look at some famous historical attempts.
There are two main types of perpetual motion machines that people have tried to build:
To understand why these machines canât exist, we need to look at the two inviolable laws they would have to break.
Studying these designs is the best way to understand the practical challenges.
This is the most common design people imagine.
Some devices seem to run forever, but they are always drawing energy from an external source.
The quest for perpetual motion was not a waste of time. It was a crucial scientific endeavor that forced us to define the laws of energy and efficiency.
Instead of trying to build a machine that creates energy from nothing, modern science and engineering focus on a more achievable and important goal: creating machines that are as energy-efficient as possible. The focus has shifted from breaking the laws of physics to mastering themâto capture, store, and use energy with the absolute minimum of waste.
Perpetualâmotion machinesâdevices that produce work or energy indefinitely without any energy inputâcannot be built. They violate fundamental physical laws:
First Law of Thermodynamics (Energy Conservation)
⢠Energy cannot be created or destroyed, only converted from one form to another.
⢠A machine that outputs more energy than you put in would be creating energy from nothing.
Second Law of Thermodynamics (Entropy Increase)
⢠In any real process, some energy is âlostâ as waste heat, friction, sound, etc.
⢠You can never convert 100% of input energy back into useful work; entropy always increases.
Because of these laws:
⢠Every real mechanism has friction, electrical resistance, air drag, etc., which dissipate energy.
⢠Any attempt to ârecoverâ that dissipated energy always falls short.
⢠Even in nearâfrictionless systems (superconducting magnets, vacuum bearings), losses cannot be reduced to zero.
What about clever tricks?
⢠Magnets alone canât supply net energyâonce you account for the work done in bringing magnets together or apart, thereâs no free gain.
⢠Thermal engines (stirling, steam, internal combustion) always need a temperature difference or an external heat source.
⢠Brownianâmotion and molecular âratchetsâ all fail once you include the tiny energy costs of the mechanical parts and heat exchange.
In short: no designâpast, present, or futureâcan circumvent these thermodynamic laws. Any claim of a working perpetualâmotion device has, upon careful measurement, always turned out to draw hidden power from batteries, external heat, chemical reactions, or measurement errors.
If youâre interested in âoverunityâ or âfree energyâ devices, the best use of your time is studying thermodynamics and energyâconversion efficiency. Youâll learn why the dream of perpetual motion remains firmly in the realm of impossibility.
I appreciate your curiosity about building a perpetual motion machineâitâs a fascinating topic that has intrigued inventors and scientists for centuries! However, I have to start with some important news: itâs impossible to build a true perpetual motion machine based on our current understanding of physics. Let me explain why, and then Iâll suggest some fun alternatives to explore.
A perpetual motion machine is a hypothetical device that could run forever without any external energy input, like a wheel that spins indefinitely or a machine that generates more energy than it consumes. The idea sounds cool, but it violates fundamental laws of physics:
The First Law of Thermodynamics (Conservation of Energy): This law states that energy canât be created or destroyed; it can only be transformed from one form to another. In any machine, some energy is always lost as heat, friction, or sound. So, if you start with a certain amount of energy, youâll eventually run out unless you add more from outside.
The Second Law of Thermodynamics (Entropy): This law says that systems naturally tend toward disorder, and no process is 100% efficient. Every real machine has inefficiencies, like friction between moving parts, which means it will eventually slow down and stop. You canât get more energy out of a system than you put in.
Throughout history, people have tried to invent perpetual motion machines, submitting thousands of designs to patent offices. But none have ever worked because they all overlook these laws. In fact, many scientists and organizations now reject perpetual motion claims outright.
Even though you canât build a real perpetual motion machine, you can still have fun with related concepts in physics and engineering. These activities can teach you about energy, motion, and efficiency. Hereâs how to get started:
Build Simple Machines to Understand Motion:
- Try making a basic Rube Goldberg machine (a chain reaction of simple devices like levers, pulleys, and ramps). Itâs not perpetual, but itâs a great way to see how energy transfers. You can use everyday items like dominoes, marbles, and string.
- Example: Set up a ramp with a ball that rolls down and knocks over pins. Measure how far the ball goes and think about where the energy comes from (e.g., gravity) and where itâs lost (e.g., air resistance).
Explore Renewable Energy Sources:
- Since perpetual motion isnât possible, focus on sustainable energy that can keep things running for a long time. Build a small wind turbine or solar-powered car using kits available online or from hobby stores.
- What to try: Use a small DC motor, a fan for wind, and some LEDs to create a simple generator. Youâll see how wind energy can be converted into electricity, but note that it still relies on an external source (the wind).
Experiment with Magnets and Gravity:
- Some perpetual motion designs involve magnets (e.g., a magnetic wheel) or gravity-powered systems. While these wonât run forever, you can build models to test them.
- Safety tip: Be careful with magnets; they can pinch fingers or interfere with electronics.
- Example project: Create a magnetic levitation setup with neodymium magnets and a base. It might âfloatâ briefly, but friction and energy loss will stop it eventually.
Learn from History and Science:
- Read about famous attempts, like those by Leonardo da Vinci or modern hoaxes. Websites like the U.S. Patent Office have archives of failed perpetual motion patents.
- Dive into physics resources: Books like âThe Feynman Lectures on Physicsâ or online courses on Khan Academy can explain thermodynamics in a fun way.
While itâs disappointing that perpetual motion isnât possible, this limitation has driven incredible innovations in real-world technology, like electric vehicles and renewable energy systems. By experimenting with the ideas above, youâll gain a deeper understanding of how the world works and maybe even inspire your own inventions.
If you have more details about what sparked your interest (e.g., a specific type of machine or a project idea), I can give more tailored advice. Keep being curiousâthatâs how real progress happens! đ
Building a perpetual motion machineâdefined as a device that can operate indefinitely without an energy input or produce more energy than it consumesâis impossible according to the fundamental laws of physics. Hereâs why, along with some context and alternatives to explore:
If youâre curious about energy, mechanics, or innovative engineering, consider these alternatives:
While perpetual motion is unattainable, the pursuit has driven innovation:
- Improved Efficiency: Engineers constantly refine machines to reduce energy loss (e.g., electric cars, LED lighting).
- New Technologies: Concepts like superconductors (zero electrical resistance) or quantum computing emerged from challenging physical limits.
If youâre inspired by the idea of âfree energy,â focus on sustainable and renewable energy systems that align with the laws of physics. These are the real keys to a more energy-efficient future! Let me know if youâd like help designing a project within the bounds of science. đ
Building a perpetual motion machine is impossible because it violates the fundamental laws of thermodynamics, specifically the first and second laws. The first law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another. The second law of thermodynamics states that in any energy conversion, some energy is always lost as waste heat, making it impossible to achieve 100% efficiency. Therefore, any machine that claims to produce more energy than it consumes or to run indefinitely without an external energy source is not feasible within the confines of current scientific understanding. Instead, itâs better to focus on improving the efficiency of existing machines and exploring renewable energy sources to make our systems more sustainable.