1)When the current through the coil of a motor flows it cases the coil to spin. 2)The spinning motion causes the wires in the coil to cut through the magnetic field. 3)The current induced (back EMF) in the wires by this spinning motion opposes the change that causes it. (Lenz's Law) 4)Current supplied against this EMF requires electrical energy. 5)It is this energy that is converted to the kinetic energy of the motor. I don't understand 4) and 5). Where does this electrical energy come from? I thought the motor's kinetic energy comes the the initial electrical current supplied to it... Thanks.