Perpetual motion machines are theoretical only. No one has actually invented one. A perpetual motion machine would have to be able to provide its own source of energy to continue operating.
There is no conclusive evidence of a perpetual motion machine being successfully invented. Such a machine would violate the laws of thermodynamics, specifically the conservation of energy. Many attempts to create perpetual motion machines have failed to provide sustained motion without an external energy source.
Lots of people who don't understand thermodynamics very well. (Perpetual motion machines are not possible.)
No one. Perpetual motion has not been invented yet.
Perpetual motion machines have, to date, always been a disappointment.
Perpetual motion machines of the first kind are hypothetical machines that violate the first or second law of thermodynamics by producing energy without any external source. Perpetual motion machines of the second kind are also hypothetical, but they generate energy by utilizing an external source and converting some of it into work without depleting the source. Both types of machines are not possible based on our current understanding of physics.
Friction opposes motion and causes energy loss in perpetual motion machines, leading to a decrease in efficiency. It plays a significant role in preventing the perpetual motion machines from achieving perpetual motion, as it continuously works against the machine's motion without providing any energy input.
Perpetual motion machines do not exist. If they did we would not be paying almost $3.00/gallon for gasoline, as a perpetual motion machine implies free energy. Newton's laws tell us that is not possible. For further explanation read up on Newton's laws of motion and thermodynamics
No, an automobile engine is not a perpetual motion machine. It relies on fuel combustion to produce energy, which is not a perpetual source. Perpetual motion machines are theoretical devices that can operate indefinitely without an external source of energy, which violates the laws of thermodynamics.
Perpetual motion. This answer is more related to the question "What do all machines DO NOT HAVE.
Perpetual motion machines are an impossibility. Energy conversion is never 100% efficient. Even if it were, friction is never zero.
Perpetual motion machines using magnets work by harnessing the repelling force between magnets to create continuous motion without the need for an external power source. The magnets are arranged in a way that allows them to repel each other, causing the machine to move in a continuous cycle. However, it is important to note that true perpetual motion machines are not possible due to the laws of thermodynamics.
It is not possible to create a perpetual motion machine using 4 watering cans or any other materials. Perpetual motion machines violate the laws of thermodynamics and cannot exist in reality.