In the 8th century, a priest in Lanciano, Italy was experiencing doubts about the real presence of Jesus in the Eucharist. In the middle of saying Mass, he said the words of consecration (âThis is my body,â âThis is my blood) and saw the bread and wine transform into real human flesh and blood.
Energy is usually defined as the ability to do work. This is an anthropocentric and utilitarian perspective of energy; however, it is a useful definition for engineering where the aim of machines is to convert energy to work.
Let's start with the definition of energy. Energy E is the capability to do work W or cause a change. So there, in the definition, is the relationship between energy and work. Energy is the source of the capability to do work. Without energy, work cannot be done. Put another way, work changes the energy level. When work is done on a system, it adds energy to that system. Which brings us to power.