Two objects A and B with masses 10.4 kg and 4.6 kg respectively attached to two ends of a light cord that passes a very light, fixed pulley. The system is released from rest so that A and B move vertically. a/ Use the energy consideration to find the velocity of A and B after they have moved 1.2 m.
b/ Compute the tension on each end of the cord.

B. a circuit. i think

It is d, all the other ones say incorrect answer .

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.