Force = mass * acceleration due to gravity Work = force * distance So the work required to raise and object a specified distance is the same amount of work retrieved when that object is returned to its original location. If the object remains in the raised position, it contains potential energy.
Potential losses might be due to wind resistance, friction, rolling resistance etc. But the losses are not due to gravity. And, as Cor implied, these external losses are what prevent perpetual motion. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
