Using the energy bar chart and assuming that energy is conserved when the spring is displaced, which of the following equations is true: A) GPEi = EPEi B) GPEi = GPEf C) GPEi = EPEf D) EPEi = EPEf Consider a mass suspended from a spring. Assuming the system to be the mass-spring-Earth system there is an energy bar chart when the mass is at the spring's equilibrium position and when the mass is hanging freely from the spring. (Assume the reference point for zero gravitational potential energy is the point where the object is freely hanging)