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The gravitational weight of a body is the force with which the Earth attracts the body. By extension, the term is also used for the attraction of the Sun or a planet on a nearby body. This force is proportional to the body's mass and depends on the location. Because the distance from the surface to the center of the Earth decreases at higher latitudes, and because the centrifugal force of the Earth's rotation is greatest at the Equator, the observed weight of a body is smallest at the Equator and largest at the poles. The difference is sizable, about 1 part in 300. At a given location, the weight of a body is highest at the surface of the Earth. Weight is measured by several procedures. See Mass
weightThe force experienced by a body on the surface of a planet, natural satellite, etc., that results from the gravitational force (directed towards the center of the planet, satellite, etc.) acting on the body. A body of mass m has a weight mg , where g is the acceleration of gravity.
the force with which a body at rest in a gravitational field acts on a suspension or horizontal support that obstructs the body’s free fall. The weight of a body P is numerically equal to the gravitational force acting upon it—that is, P = mg, where m is the mass of the body and g is the acceleration of free fall (or the acceleration of gravity). Since the mass of a body is a constant quantity (under ordinary conditions), but the value g changes on earth with latitude and altitude above sea level, the weight of a body changes correspondingly. At the same time the value g, as well as the weight, depends on the acceleration caused by the rotation of the earth around its axis; for this reason, the weight of a body at the equator is 1/288 less than at the poles.
Within a small field near the earth’s surface the value g may be considered constant and the weight of a body may be considered proportional to its mass. This assumption is used for measuring the mass of bodies by weighing them on beam balances; here the value g for the weighed body and the balance weight are considered identical. Spring balances measure the weight of a body; to determine mass when using them, it is necessary to know in addition the value of g at the point of weighing. Weight and mass are different physical quantities that cannot be considered identical; they are measured in different units—weight in units of force (newtons, kilograms-force, tons-force, and others); and mass in units of mass (kilograms, grams, tons, and so on).
A body immersed in a liquid or gas medium is acted upon, in addition to the force of gravity, by Archimedes’ force, which is equal to the weight of the displaced volume of the medium. For this reason, for example, a spring balance will show a lesser weight in an air medium than in a vacuum; for beam balances the differences in indications will depend on the ratio of the density of the balance weight to that of the weighed body.
A body at rest in an elevator that is moving vertically with an acceleration w will act on the floor of the elevator with a force F = m(g ± w) (plus sign when moving upward, minus sign downward), which is equivalent to an increase (overload) or decrease in weight. During free fall of the elevator (w = g), weightlessness occurs; such a state occurs for any body that is moving freely and progressively in a gravitational field (a rocket, satellite, and so on).
S. M. TARG
What does it mean when you dream about a weight?
Being weighed down in a dream may indicate that the dreamer is waiting for someone or something to change before they can feel unburdened in their life. Lightness, alternatively, often represents lighter, or more positive, emotions.