### Mass and Weight Review and Equations

**Thermodynamics Directory**** | Heat Transfer Directory**

*Mass and Weight Review and Equations*

The *mass *(m) of a body is the measure of the amount of material present in that body. The *weight *(wt) of a body is the force exerted by that body when its mass is accelerated in gravitational field. Mass and weight are related as shown in following Equation:

Note that gc has the same numerical value as the acceleration of gravity at sea level, but is not the acceleration of gravity. Rather, it is a dimensional constant employed to facilitate the use of

Newtons Second Law of Motion with the English system of units.

The weight of a body is a force produced when the mass of the body is accelerated by gravitational acceleration. The mass of a certain body will remain constant even if the gravitational acceleration acting upon that body changes.