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Research Article: Mass

This encyclopedia article consists of approximately 2 pages of information about Mass.
This section contains 458 words
(approx. 2 pages at 300 words per page)
Purchase our Mass Encyclopedia Article

Mass

Intuitively we know that mass is the amount of matter in an object, but physicists, especially Isaac Newton, very carefully defined mass as a body’s resistance to being accelerated. By Newton’s second law, F=ma, mass determines to what degree an object will respond to a specific force. For a given force the acceleration will be smaller if the mass is larger, and vice-versa.

Mass has inertia, or resistance to motion, and the mass in Newton’s second law is called the inertial mass. Once in motion at a constant velocity, inertial mass resists changes to that motion. These observations are formalized in Newton’s first law: "A body at rest will remain at rest and a body in motion will remain in motion with constant velocity unless an external net force acts upon the body."

Mass also responds to gravity. A dropped egg will be...

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This section contains 458 words
(approx. 2 pages at 300 words per page)
Purchase our Mass Encyclopedia Article
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