Definition:Inertia

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Definition

Inertia is the tendency of a body to maintain the same velocity in the absence of an external force, in accordance with Newton's First Law of Motion.

Equivalently put, inertia is the resistance of a body to a change in its motion.

Inertia is equivalent to mass.


Linguistic Note

The word inertia comes from the Latin for laziness or idleness.


Sources