Despite decades of feverish and fraudulent research, the perpetual motion machine remains elusive. By perpetual motion, gadgeteers really mean perpetual work. An object in motion, as Galileo and ...

This experiment puts a supposed perpetual motion device to the test. We break down how it works, what physics says should happen, and whether the motion can actually last without an external energy ...

Let's start with a water wheel in still water with an electric generator hooked up to it. Let's say it has a ratchet wheel so it can only turn in one direction. I want to calculate the probability ...