Mass | Definition, Units, & Facts | Britannica
https://www.britannica.com/science/mass-physics
WEBApr 2, 2024 · Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. Mass is measured in units of kilograms.
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