A mass attached to a vertical spring causes the spring to stretch and the mass to move downwards. What can you say about the spring's potential energy(EPE) and the gravitational potential energy of the mass? A:both epe and gpe decrease
B: epe increases and gpe decreases
C: both epe and gpe increase
d: epe decreases and gpe increases

The objects are acted upon by only one force. gravity. mass times the acceleration of gravity (-9.81meters/second squared).

What are you trying to ask?

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.

Answermuch larger;