Science Buddies: "Ask an Expert"

hello friends..
i need some answers..please help.
1)why we cannot generate electricity using perpetual motion?
2)what makes the perpetual motion stop from a continue rotation?
waiting for your answers...

romesh - Simply, perpetual motion does not exist in any system. There may be incredibly efficient, low loss systems where it might appear that motion continues for long periods of time, but there is still a finite limit to its continuance. What is your example of the perpetual motion system you refer to? Perhaps we can explain how it is inconsistent with the laws of physics.

Rick Marz