perpetual motion machine of the first kind


perpetual motion machine of the first kind

[pər′pech·ə·wəl ′mō·shən mə‚shēn əvthə ′fərst ‚kīnd] (physics) A mechanism which, once set in motion, continues to do useful work without an input of energy, or which produces more energy than is absorbed in its operation; it violates the principle of conservation of energy.