Learn the law of conservation of energy with definitions, formulas, solved examples, and exam tips. Ace Physics for boards & JEE/NEET 2025! Learn about the law of conservation of energy , which states that the total energy of an isolated system remains constant. Explore the history, applications, and implications of this principle in physics and chemistry. Conservation of energy , principle of physics according to which the energy in a closed system remains constant. Energy is not created or destroyed but merely changes forms. For example, in a swinging pendulum, potential energy is converted to kinetic energy and back again. Learn what is the law of conservation of energy , how it is derived from potential and kinetic energy , and how it applies to various phenomena. See examples of energy transformation and conservation in different systems and devices.
