Comments by "S Andersson" (@sandersson2813) on "Polestar 2 EV review - see where it beats the Tesla Model 3" video.

@AutomaticDuck300 Ha ha ha ha ha. That is the most naive thing I have ever heard. You early don't understand physics at all.
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@AutomaticDuck300 No, not as far as we know. Perpetual motion is as far as we know it impossible. You can regenerate some energy from slowing down, but it's a fraction of what is required to start and continuing to make it move. If you've ever seen how much energy it requires to run a dynamo light on a bike you'll know that it is a stupid idea to suggest a car could run on the energy of the wheels going around. At best you might be a me to run some of the electrics, but it's hilarious to suggest it could power a 2.2 ton car. If there was a way, don't you think it would have been found by now? There's simply too much energy lost in the process through heat, noise, vibration, friction, air resistance, engine/motor inefficiencies etc.
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