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Non-Conservative Forces

Definition

Non-conservative forces are external forces that do work on an object, causing a change in its mechanical energy. These forces depend on the path taken by the object and can result in energy being transferred to or from the system.

Analogy

Imagine you're driving a car and encounter traffic lights along your route. The time you spend waiting at each red light is like non-conservative forces acting on your car. They slow you down and affect your overall travel time, just as non-conservative forces affect an object's mechanical energy.

Related terms

Friction: Friction is a common example of a non-conservative force. It opposes the motion of objects sliding against each other, converting kinetic energy into thermal energy.

Work-Energy Principle: The work-energy principle states that the net work done on an object equals its change in kinetic energy. Non-conservative forces contribute to this net work, altering an object's kinetic energy.

Air Resistance: Air resistance is another example of a non-conservative force that acts against the motion of objects moving through air. It converts some of their kinetic energy into other forms such as heat or sound.