A picture of weight 4N is supported by a string on a nail as shown below. Find the tension on the strings at P and Q if the strings are each inclined at 80° to the
vertical.
80
:80
T
P
4N

Ireally just need to get finished with precal! i’m really sorry i have to do this! hope this !

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.