Inertia
Version 1.0.0 · Updated 2026-07-28
CORE DEFINITION
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 is 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.
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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 is 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.
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Newton's first law: an object maintains its state of motion until acted upon by an external force. As a mental model, it metaphorically refers to the tendency of systems, organizations, and individuals to maintain the status quo.
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Inertiaverified
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