Two identical 1500 kg cars are traveling at 15 m/s in a straight line. Car A slams on its brakes and slows to a stop in 1.95 seconds. Car B brakes slowly and stops in 5
seconds. Which car has the greater change in momentum? *

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.

Dformation of a precipitate