What do you mean by conservation of energy?

Ans. In the principle of physics, the law of conservation of energy states that energy can only be converted from one form of energy to another. It can be neither created nor destroyed. That’s why there is the same amount of energy unless it’s added from the outside to the system, and when the energy is not useful for any productive work, some energy is lost to the surroundings. It might happen in all energy transformations.