KnowraPerpetual motion machineLinked fromLinked fromThe 6 pages that link to Perpetual motion machine, each with the reason it gives.All 6Broader topic 1Related 1Compared with 4Mechanical advantageCompared with: Force multiplication cannot evade energy conservation or make a machine deliver unlimited work.Heat engineCompared with: A machine producing work from heat alone without rejecting heat would violate the second law.Perpetual motionBroader topic: The machine is the concrete engineering claim that the broader idea rules out.William ThorntonRelated: Thornton’s patent-office work included claims for devices that could not meet this physical ideal.Simple machineCompared with: Simple machines cannot create energy, despite their ability to multiply force.Cornelis DrebbelCompared with: His atmospheric clock was sometimes mistaken for a perpetual-motion device, but it depended on environmental changes.