The picture shows a loaded cart of mass 50 kg being pulled. The cart moves with a constant velocity, and the coefficient of kinetic friction between the man and the ground is 4k = 0.25. The angle formed by the rope with the horizontal is 45°.
What is the amount of tension in the string?
A)
138.6 N
B)
183.6 N
213.6 N
D)
313.6 N

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.

Good moring let me you on this question the answer the electric force  have a good day ; )