A 400 kg car is moving north with a velocity of, 20.0 m/s when it hits a car, who is traveling south, with a mass of 335kg and traveling a velocity
of 14.0 m/s. After the collision, the two cars stick together, what is the
final velocity of the cars as they travel together & what direction would
they be moving?

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.