Perpetual motion machine - Intuitive meaning

In summary, Feynman discusses the concept of perpetual motion machines in the context of weight-lifting machines. He defines perpetual motion as a device that can run forever without receiving energy from an external source, and explains that it is not possible due to the law of conservation of energy. He also clarifies that for a weight-lifting machine to be considered perpetual, it must be able to lift a weight without any other temporary changes, and must be self-contained. Feynman further explains that conservative forces play a role in these machines, and that the net work done by them is zero if the machine returns to its original position. He cautions against falling for false claims of free energy machines, as the path of the machine does not affect
  • #36
bland said:
It couldn't be in the same state anyway because of the brakes would generate heat because.
I said "regenerative braking system" for a reason. Perhaps I should have said "ideal regenerative braking system".

Anyway this is irrelevant to the point I was making. That gravity is conservative.
 
<h2> What is a perpetual motion machine?</h2><p>A perpetual motion machine is a hypothetical device that can continue to operate indefinitely without any external energy source. It is often described as a machine that can produce more energy than it consumes, violating the laws of thermodynamics.</p><h2> Is it possible to create a perpetual motion machine?</h2><p>According to the laws of thermodynamics, it is not possible to create a perpetual motion machine. The first law states that energy cannot be created or destroyed, only transferred or converted. The second law states that in any energy transfer or conversion, some energy will always be lost as heat. Therefore, a perpetual motion machine would violate these laws and cannot exist in reality.</p><h2> Why do people still try to create perpetual motion machines?</h2><p>Despite the scientific evidence that it is impossible, people still try to create perpetual motion machines because it would have immense practical applications. It could potentially solve the world's energy crisis and revolutionize transportation. However, these attempts have all been unsuccessful and have only led to further understanding of the laws of physics.</p><h2> Are there any machines that can run indefinitely?</h2><p>No, there are no machines that can run indefinitely without any external energy source. Even machines that seem to run for a long time, such as wind-up clocks, eventually stop due to friction and other factors. The closest thing to a perpetual motion machine is the Earth's rotation, which is powered by the Sun's energy.</p><h2> What are some examples of perpetual motion machines?</h2><p>As mentioned before, there are no real examples of perpetual motion machines. However, some famous attempts include the Orffyreus Wheel, the Bessler Wheel, and the Perpetual Motion Clock. These machines have all been debunked and proven to be fraudulent or relying on hidden energy sources.</p>

FAQ: Perpetual motion machine - Intuitive meaning

What is a perpetual motion machine?

A perpetual motion machine is a hypothetical device that can continue to operate indefinitely without any external energy source. It is often described as a machine that can produce more energy than it consumes, violating the laws of thermodynamics.

Is it possible to create a perpetual motion machine?

According to the laws of thermodynamics, it is not possible to create a perpetual motion machine. The first law states that energy cannot be created or destroyed, only transferred or converted. The second law states that in any energy transfer or conversion, some energy will always be lost as heat. Therefore, a perpetual motion machine would violate these laws and cannot exist in reality.

Why do people still try to create perpetual motion machines?

Despite the scientific evidence that it is impossible, people still try to create perpetual motion machines because it would have immense practical applications. It could potentially solve the world's energy crisis and revolutionize transportation. However, these attempts have all been unsuccessful and have only led to further understanding of the laws of physics.

Are there any machines that can run indefinitely?

No, there are no machines that can run indefinitely without any external energy source. Even machines that seem to run for a long time, such as wind-up clocks, eventually stop due to friction and other factors. The closest thing to a perpetual motion machine is the Earth's rotation, which is powered by the Sun's energy.

What are some examples of perpetual motion machines?

As mentioned before, there are no real examples of perpetual motion machines. However, some famous attempts include the Orffyreus Wheel, the Bessler Wheel, and the Perpetual Motion Clock. These machines have all been debunked and proven to be fraudulent or relying on hidden energy sources.

Similar threads

Feynman Lectures vol.1 Chapter 4 Topic 4-2GravitationalPotentialEnergy
Replies
9
Views
2K
Perpetual motion machines can't exist (Feynman's lectures)
Replies
11
Views
3K
Feynman: Reversible machines, no perpetual motion?
Replies
2
Views
2K
What is Feynman's Definition of Perpetual Motion?
Replies
4
Views
7K
B How do mechanical (weighing) scales work?
Replies
9
Views
2K
When can we have perpetual motion?
Replies
5
Views
2K
I Feynman's reversible and irreversible machines
Replies
5
Views
4K
Feynman's reversible lifting machine analogy- help
Replies
4
Views
10K
What Are the Challenges of Creating a Perpetual Motion Machine?
Replies
2
Views
375
Feynman explanation of gravitational energy
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top