A vertical spring (ignore its mass), whose spring constant is 800 N/m, is attached to a table and is compressed down by 0 160 m Part A
Area
What upward speed can it give to a 0.360 kg ball when released?
N
and include the appropriate units.

The answer is frictional force

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.