Motive power may refer to: In thermodynamics, natural agents such as water or steam, wind or electricity, that do work In mechanics, the mechanical energy associated with the motion and position of an object In physics, a synonym for power In mechanical engineering, the source of mechanical power of a propulsion system It may also refer to: Motive power, a colloquial term for a railway locomotive Motive Power, an Australian railway magazine Motive power depot, a railway running shed Electric Motive Power, an English electric car MotivePower, a subsidiary of Wabtec