The applications of energy function by the dynamics of inelastic collisions, because the force moves with the mass it is acting upon. Some persons claimed that the disagreements were nothing but semantics. But in fact, the issue is not semantics, because energy is used in discrete quantities as fuel. Fuel will only produce a definable amount of mv, not mv . The Relativeness of Power.
Power thereby varies with velocity.
But velocity is a relative concept. Everything has an infinite number of velocities simultaneously depending upon reference points. For example, a spacecraft might be moving at ten thousand miles per hour relative to the earth, and twenty thousand miles per hour relative to a comet. Therefore, if energy as mv were being added through a rocket engine, the rate of energy addition would be twice as much relative to the comet as to the earth. But the fuel going through the engine would have the same rate relative to the earth as to the comet.