Mass is the amount of matter in an object or a measure of its inertia. Learn how mass differs from weight, how to measure mass , and how mass relates to scientific laws and phenomena. Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different masses. Mass in modern physics has multiple definitions which are conceptually distinct, but physically equivalent. Mass can be experimentally defined as a measure of the body's ... What is Mass ? Mass , in physics, is defined as the measure of the amount of matter present in an object or a system. Mass is an intrinsic characteristic of an object and is independent of its location or the forces acting upon it. The standard unit of mass in the International System of Units (SI) is the kilogram (kg). 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.
