Can someone please explane to me

I swore up and down it could be done so I tried this once when I was 16 years old. I took two small electric motors (the kind you find in toy cars), linked their shafts together and wired them together (essetially). They would drive each other but for a very short period of time (a sec or two), then stop. Thinking I could gear the generator to turn faster than the motor but it still didn't work. I leard years later it failed due to the losses in the system which could never be overcome.

Scientist working with wire cooled down close to absolute zero have reduce conduction resistance to practically zip. With this they've been able to reduce losses to nothing. I still don't think it would make my idea work. One would have to remove ALL loses - electirical, mechanical (friction), etc., and then you would come close.

 

If you remove all of the loses, then all you are doing is coasting. Take out the motor and generator, and use frictionless bearings, and you have the same thing.

Tom

 

It can, but never to the point of recapturing the initial energy content of the battery, which ultimately has to be restored from some external source. It reflects what is known as the irreversible process of a closed system in thermodynamics, and obeys the Second Law.

It is merely a tiny manifestation of the fact that the energy in the Universe is continually running down; but since there is so much of it, on a cosmic scale, in human terms we don't really notice.