Perpetual motion machine electric cars are not feasible
Posted: Sat Jan 19, 2019 1:24 pm
You use electricity to move the car forward. Right?
So, if you try to generate back the required electricity, from this "moving forward", you essentially slow the vehicle down to 0.
Before you can get even a notable fraction of the used electricity back, the car comes to a stop.
Braking can generate electricity, sure. But it is never more electricity than what was used to speed up.
Yes, driving downhill yields a net electricity gain. But you can't keep driving downhill forever. Over time it must balance out; ΔUphill = ΔDownhill.
So, if you try to generate back the required electricity, from this "moving forward", you essentially slow the vehicle down to 0.
Before you can get even a notable fraction of the used electricity back, the car comes to a stop.
Braking can generate electricity, sure. But it is never more electricity than what was used to speed up.
Yes, driving downhill yields a net electricity gain. But you can't keep driving downhill forever. Over time it must balance out; ΔUphill = ΔDownhill.