Non-conservative systems

Definition

Non-conservative systems are physical systems in which mechanical energy is not conserved. Energy can be converted from one form to another or lost due to external factors such as friction or air resistance.

Analogy

Imagine a roller coaster ride where the initial potential energy is gradually converted into kinetic energy as the coaster moves downhill. However, due to friction and air resistance, some of that energy is lost along the way, resulting in a decrease in total mechanical energy.

Related terms

Friction: The force that opposes motion between two surfaces in contact with each other.

Air resistance: The force exerted by air molecules on an object moving through the air.

Work-energy theorem: States that the work done on an object is equal to the change in its kinetic energy.