What must be the initial velocity of a silver (Ag) bullet at a temperature of 20oC so that the heat developed when it is brought to a complete stop shall be sufficient to bring it to melting point? (Melting point of Silver is 962oC, CAg =240J/kgoC) 672 m/s=2420 km/h

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.