Perpetual Motion Machine

A perpetual motion machine is a hypothetical device that can operate indefinitely without any energy input, producing useful work or energy continuously. The concept challenges the laws of thermodynamics, specifically the conservation of energy and the idea that all systems experience energy loss through friction, heat, or other inefficiencies. Despite many attempts throughout history, no perpetual motion machine has been successfully built, as real-world physics prevents such a device from functioning indefinitely without external energy sources. Therefore, perpetual motion remains an interesting idea but is considered impossible according to current scientific understanding.