pulls a 9 kilogram box with a rope. The rope makes an angle of 30 degrees from the horizontal. They pull with a constant tension force equal to 297 Newtons. They pull the box a distance of 4 meters to the right and then let it go. It travels across the flat, friction-less ground. What speed does it move at once it is released?

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.