The law of conservation of energy states that energy can neither be created nor destroyed. It may be transformed from one form to another form, but the total energy of an isolated system remains constant.
Law of conservation of energy
According to the law of conservation of energy, energy cannot be created or destroyed, although it can be changed from one form to another. This exploration led to the definition of two major types of energy—mechanical energy (KE + PE) and energy transferred via work done by non-conservative forces (Wnc).
- Two football players collided on the field, and both went flying backwards. The energy was transferred from each player to the other, sending them in the opposite direction from which they had been running.
- Fingers hitting piano keys transfer energy from the player’s hand to the keys.