Weight & Mass

Weight & Mass

In physics, mass is a property of a physical system or body. In everyday usage, mass is sometimes referred as to "weight", the units of which may be pounds of kilograms. In scientific use, however, the term "weight" refers to the reaction force to any mechanical force on an object which acts to move it way form a natural path of free fall.

About Weight & Mass

The term body weight is used in daily English speech as well as in the contexts of biological and medical sciences to describe the Earth's gravitational pull on an organism's body. Body weight is measured in kilograms throughout the world, although in some countries it is still measured in pounds (e.g. United States) or stones and pounds (e.g. among people in the United Kingdom) and thus some people may not be well acquainted with measurement in kilograms. Most hospitals, even in the United States, now use kilograms for calculations, but use kilograms and pounds together for other purposes. Body weight of a person is theoretically the weight of the person without any items on. However, for all practical purposes, body weight is taken with clothes on but often without the shoes and heavy accessories like mobile phones and wallets.

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