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
- 1966: Isaac Asimov: Understanding Physics ... (previous) ... (next): $\text {I}$: Motion, Sound and Heat: Chapter $3$: The Laws of Motion: Inertia