If we harness gravity, then will it be a perpetual motion machine or in the category of natural resources? - Quora
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What is a picture of a perpetual motion machine that has been proposed, tried, or is purely sci-fi? How is it supposed to work, and why doesn't it? - Quora
![Perpetual motion machine Idea #perpetualmotionmachines 永久機関 - YouTube | Brincadeiras para crianças, Artesanatos divertidos, Invenções Perpetual motion machine Idea #perpetualmotionmachines 永久機関 - YouTube | Brincadeiras para crianças, Artesanatos divertidos, Invenções](https://i.pinimg.com/originals/be/80/7a/be807adeeb35c6f643ef8340ce0501e8.jpg)