A feld created around any object with mass extending to infinity but diminishing with distance.

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Gravitational Field strength

Force (gravitational) per unit mass at a point in a g field

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Gravitational field lines

Lines of force used to map field pattern around object

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Radial Field

Symmetrical field that diminishes with distacne^2 form centre

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Uniform Gravitational Field

Field lines are parallel and value for g is constant

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Newton's Law of Gravitation

The force between 2 point masses is dircelty proportional to the product of the masses and inversely proportional to the square to the distance between them.

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Kepler's 1st law

The orbit of a planet is an ellipse with the sun at one of the two foci.

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Aphelion

The furthest point from the sun in an orbit

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Perihelion

The closet point to the sun in an orbt

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Kepler's 2nd Law

A line segement connecting a planet to the sun sweeps out equal areas during equal time intervels.

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Kepler's 3rd Law

The square of the orbital period is directly proportional to the cibe of its orbital radius.

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Astronomical Unit

The mean distance from the earth to the sun (1.5 x 10^11)

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Geostationary Satellites

A satellite that travels above equator at same point in direction of earth's rotation with a period of 24hrs.

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Gravitational potential

The work done per unit mass to bring an object from infinity to a point in a g field.

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Escape velocity

The minimum velocity at which an object has just enough energy to leave a g field.

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Electric field strength

The force experienced per unit positive charge

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Coulomb's Law

Any two point charges exert an electrostatic force on each other directly proportional to the product of their charges and inversely proportional to the square of their separation.

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Electric Pontential

The work done per unnit positive charge to bring a charge from infinity to a point in an e field.

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Other cards in this set

Card 2

Front

Force (gravitational) per unit mass at a point in a g field

Back

Gravitational Field strength

Card 3

Front

Lines of force used to map field pattern around object

Back

Card 4

Front

Symmetrical field that diminishes with distacne^2 form centre

Back

Card 5

Front

Field lines are parallel and value for g is constant

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