inertia
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Article
11 sectionsContents
- History and development
- Early understanding of inertial motion
- Theory of Impetus
- Classical inertia
- Relativity
- Etymology
- Rotational inertia
- See also
- References
- Further reading
- External links
Inertia is the natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes its velocity to change. It is one of the fundamental principles in classical physics, and described by Isaac Newton in his first law of motion (also known as The Principle of Inertia). It is one of the primary manifestations of mass, one of the core quantitative properties of physical systems. Newton writes:
In his 1687 work Philosophiæ Naturalis Principia Mathematica, Newton defined inertia as a property: