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## gravitational force

The force of attraction, F, that exists between all bodies. For any two bodies, it is directly proportional to the product of the two masses and inversely proportional to the square of the ...

## gravitational force Quick reference

### The Concise Oxford Dictionary of Mathematics (6 ed.)

Reference type:
Subject Reference
Current Version:
2021

...gravitational force The force of attraction that exists between any two bodies, described by the inverse square law of gravitation . See also gravity...

## gravitational force Quick reference

### A Dictionary of Space Exploration (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

...gravitational force ( gravity ) One of the four fundamental forces of nature ( see gravity ), the other three being the electromagnetic force, the weak nuclear force, and the strong nuclear force. The gravitational force is the weakest of the four forces, but acts over great distances. The particle that is postulated as the carrier of the gravitational force is the...

## gravitational force Quick reference

### A Dictionary of Mechanical Engineering (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...gravitational force (Unit N) A force of attraction that exists at all points outside the Earth, directed toward the centre of the Earth and of magnitude GM/r 2 on unit mass, where G is the gravitational constant , M ≈ 5.983 × 10 24 kg is the mass of the Earth, and r ≈ 6.365 × 10 6 m is the distance from the centre of the Earth. On the surface of the Earth the gravitational force on a mass of 1 kg is about 9.81 N. See also Newton’s law of gravitation...

## gravitational force Quick reference

### A Dictionary of Astronomy (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

... force The force of attraction, F , that exists between all bodies. For any two bodies, it is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them. The constant of proportionality is G , the universal gravitational constant. Expressed in mathematical form, F = Gm 1 m 2 / d 2 , where m 1 and m 2 are the two masses and d is their distance...

## uniform gravitational force Quick reference

### The Concise Oxford Dictionary of Mathematics (6 ed.)

Reference type:
Subject Reference
Current Version:
2021

...uniform gravitational force A gravitational force , acting on a particular body, that is independent of the position of the body. For example, the gravitational force acting on a particle of mass m near the Earth’s surface, assumed to be a horizontal plane, can be taken to be − mg k , where k is a unit vector directed vertically upwards and g is the magnitude of the acceleration due to...

## non-gravitational force Quick reference

### A Dictionary of Astronomy (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

...gravitational force An effect that accelerates or decelerates a comet’s motion, changing its orbital period. Such forces are caused by jets of gas emerging from active regions on the surface of the nucleus, giving a rocket-like effect. Non-gravitational forces are most marked when the nucleus is highly active, close to perihelion, leading to uncertainties in subsequent returns for some periodic comets . They are, for example, responsible for systematic changes in the perihelion time of Comet Encke , and the apparently delayed 1992 return of Comet ...

## gravitational force

The force of attraction, F, that exists between all bodies. For any two bodies, it is directly proportional to the product of the two masses and inversely proportional to the square of the distance ...

## uniform gravitational force

A gravitational force, acting on a particular body, that is independent of the position of the body. The gravitational force on a body in a limited region near the surface of a planet is ...

## non-gravitational force

An effect that accelerates or decelerates a comet's motion, changing its orbital period. Such forces are caused by jets of gas emerging from active regions on the surface of the nucleus, giving a ...

## Religion and Liberty Reference library

### Liberal Islam: A Sourcebook

Reference type:
Subject Reference
Current Version:
2022
Subject:
Religion
Length:
8,567 words
Publisher:
Oxford University Press

... In general, an object in a given force field will, of necessity, behave in a calculable and predictable way. For any object, whether a stone, a plant, or a human society, force means movement. For example, a piece of metal that is released within earth's gravitational field will fall in a straight line. Its position and velocity are calculable at every moment. Similarly, the behavior of a human being who is motivated only by the demands of his or her appetite is predictable. However, if in the place of one force, two or more forces are introduced—for...

## Colossians Reference library

### The Oxford Bible Commentary

Reference type:
Subject Reference
Current Version:
2022
Subject:
Religion
Length:
10,129 words
Publisher:
Oxford University Press

...meaning evaporates on inspection. Lightfoot ( 1904 : 154 ) perfectly catches the spurious profundity of the expression by commenting ‘He impresses upon creation that unity and solidarity which makes it a cosmos instead of a chaos’. How exactly is this achieved? ‘The action of gravitation … is an expression of His mind’! Paul becomes completely serious in his introduction to the second strophe. The church must be characterized by the organic unity of a living ‘body’ ( v. 18 a ). The insight is but an extension and clarification of ‘you are all one person in...

## inverse square law of gravitation

The following law that describes the force of attraction that exists between two particles, assumed to be isolated from all other bodies. Consider two particles P and S, with gravitational masses m ...

## anti-gravitational

Reference type:
Overview Page
Subject:
Literature
That opposes or nullifies the force of gravity. 1900 G. Griffith Visit to Moon Pearson's Mag. Feb. 141 By means of the “R.Force,” or Anti-Gravitational Force, of the secret of ...

## gravitational movement

A form of passive movement resulting from the accelerating force exerted by the gravitational field of the Earth. It is relatively constant in direction and magnitude (see free fall). Gravitational ...

## conservative force

A force or field of force is conservative if the work done by the force as the point of application moves around any closed path is zero. It follows that for a conservative force the work done as the ...

## gravitation

The force of attraction that operates between all bodies. The size of the attraction depends on the masses of the bodies and the distance between them; gravitational force diminishes with the square ...

## gravitational acceleration

Following Newton's law, the force F between two masses m1 and m2, separated by a distance r, is given by F = Gm1m2/r2, where G is the gravitational constant. The gravitational acceleration, g, is ...

## gravitational field strength

The strength of the Earth's gravitational field at a particular point. It is defined as the gravitational force in newtons that acts on a mass of one kilogram. The value of g on the Earth's surface ...

## Newton's law of gravitation

There is a force of attraction between any two massive particles in the universe. For any two point masses m1 and m2, separated by a distance d, the force of attraction F is given by F = m1m2G/d2, ...

## central force

A force acting on a particle, directed towards or away from a fixed point. The fixed point O may be called the centre of the field of force. A central force F on a particle P is given by F=f(r)r, ...

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