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.
Kinetic energy could also be defined as the capacity to do work. Its also true that potential energy can be defined as the capacity to do work. In fact Classical Dynamics of Particles & Systems - 3rd Ed., Marion and Thornton, Harcourt-Brace-Jovanovich, (1988) gives the following statement.