If a car goes along a straight road heading east and speeds up from 45 ft/s to 60 ft/s in 5s, calculate the acceleration

acceleration = change in velocity/ time = (final velocity - initial velocity)/time 

accel = (60ft/s - 45ft/s)/5s = 3 ft/s

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.

When is this