ineedanswers need help to clarify doubt about: : How can there be no such thing as a perpetual motion machine?
Theoretically, it sounds so simple, but in reality, it is increasingly difficult. Why? And why is creating a “close-to-perpetual-motion” machine so damn easy?
I said creating a “close-to-perpetual-motion” machine was easy. I never said creating an actual perpetual motion machine was easy.
Try this:
Answer by albus severus-siriusjames potter
thats science for u
Add your own answer in the comments!
Everything requires energy. As of right now, our science does not allow us to creat a machine that produces as much energy as it consumes due to friction for one. Very low friction is possible but not zero. So any machine that we know how to build today has some friction that must be over come. It takes energy to move an object.
Because the idea of a perpetual motion machine is that it can somehow produce more energy than is put into it. This violates the First Law of Thermodynamics – Conservation of Energy. It states that energy cannot be created or destroyed, only transfered. Since it is not possible for any machine we have today to be 100% efficient, it would be impossible to have a perpetual motion machine (100+% efficiency).
I don’t get your logic. First you say it is “increasingly difficult”, then you say it is “so damn easy”? It has to do with the 2d and 3d Laws of Thermodynamics, which suggest that such a machine would have to reject heat at absolute zero, a temperature which can’t be attained.