What principle states that energy can neither be created nor destroyed?

The principle that states energy can neither be created nor destroyed is known as the Law of Conservation of Energy. This fundamental concept in physics asserts that the total amount of energy in a closed system remains constant over time. While energy may change forms, such as from kinetic to potential energy or thermal energy, the overall energy remains unchanged.

This principle is essential in various branches of physics and is foundational for understanding energy interactions in systems, whether they are mechanical, electrical, or thermal. It explains why the energy input in any process must equal the energy output, accounting for energy used in work, heat transfer, and any losses due to inefficiencies.

The other concepts mentioned do not pertain to energy conservation specifically. The Law of Diminishing Returns relates to economics and productivity rather than energy. The Law of Motion refers to Newton’s laws that describe the relationship between force and motion but do not address energy conservation. The First Law of Thermodynamics, while often considered synonymous with the conservation of energy, specifically deals with energy transfer in thermodynamic processes. Thus, while the correct answer encapsulates the essence of the conservation principle, it is important to recognize the nuances of related terms and laws in physics.