What does Newton's 2nd Law explain? A. Why it is hard to pick up a very light object.
B. Why you must wear a seat belt.
C. Why you must push harder to move a car farther.
D. Why a ball keeps moving after it has been thrown.

What formula  this one  (x_/

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.