Are free energy devices possible to build?Which will run forever?

Question

I would like to know if free energy devices are possible to build,Which will run forever. Well tesla was first believed to have built such a device,And later on many scientists have also claimed to have built similar devices. So what could be the source of energy behind it

Answer 1

"So what could be the source of energy behind it" is actually the answer to your question. If a "source of energy" is required to keep it (whatever it is) going, then it is not perpetual...without that source, it would eventually stop.

A perpetual motion machine is possible if and only if that machine is frictionless. If it were frictionless and a force were applied momentarily to accelerate it, it would run forever even after the force is removed. Once a mass is moving, the laws of momentum say that mass will continue moving until another force is applied to stop it.

Unfortunately, there is no such thing as a frictionless machine. Science has done remarkable things to reduce, but not eliminate, friction. So kinetic energy (the motion) is continually dissipated as heat. In the end, without adding energy, the machine runs out of kinetic energy and stops.

Answer 2

What you are describing is something akin to a perpetual motion machine. Bascially the object would produce its own energy (in this case in the form of motion aka kinetic) thus keeping it in motion. The main problem with this is it defies the fundamental laws of physics. Newton stated that an object in motion will stay in motion unless an outside force acts upon it. We know that friction is an ever present outside force thus keeping perpetual motion machines from existing. As far as a free energy machine another law states that matter cannot be created or destroyed, this applies to energy as well. If you remember from the fifth grade you learned the water cycle, well energy is in a cycle akin to the water cycle, where the energy is never destroyed or used up it is just transferred into other forms of energy that may or may not be kenetic, such as heat.

Answer 3

With our current knowledge, at the mankind level, nothing involving energy is "free". The energy used by any current device to produce energy is always greater. And thus you will always need to input additional energy into your machine to keep it moving. This is because of the loses involved due to things like friction, resistance, generation and dissapation of heat, etc. This may change as we learn more about our universe. Try a physics course and perhaps you will be the one to achieve the utlimate machine. An understanding of thermodynamices would also help.

Answer 4

To my knowledge, the solar cookers being sold in Africa are a sort of "free energy device" because the sun's energy is used to cook food. It is truly a labor-saving device because in Africa, about 3-5 hours per day is spent foraging for firewood, lighting fires, etc. The device only costs $1, and produces its cooking energy whenever the sun is out (not too difficult in sunny Africa).

Answer 5

"Device" means less than 100% efficiency.
Claims will always be accompanied by some outside source of extra energy.

Answer 6

The problem is you will have to use enegry from somewhere to initially power your device. So there is no free enegry.