Orbital motion of satellites: Space physics: Physics: GCSE (9:1)

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13 Terms

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Gravity

The force needed to maintain a stable orbit of planets around a star and satellites around a planet

<p>The force needed to maintain a stable orbit of planets around a star and satellites around a planet</p>
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Orbit

The circular path that an object follows as moves around another body in space

<p>The circular path that an object follows as moves around another body in space</p>
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Satellite

Any object that orbits a planet

<p>Any object that orbits a planet</p>
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Natural satellite

A natural object that orbits a planet e.g. the Moon

<p>A natural object that orbits a planet e.g. the Moon</p>
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Artificial satellite

An artificial object that orbits a planet e.g. communication satellites

<p>An artificial object that orbits a planet e.g. communication satellites</p>
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Stable orbit of a satellite

When the speed of a satellite is slow enough to stop it flying off into space, but fast enough to stop it falling back towards the planet

<p>When the speed of a satellite is slow enough to stop it flying off into space, but fast enough to stop it falling back towards the planet</p>
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Problem when a satellite is travelling too quickly

The gravitational attraction between the Earth and the satellite is too weak so the satellite will fly off into space

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Problem when a satellite is travelling too slowly

The gravitational attraction between the Earth and the satellite will be too strong so the satellite will fall towards the Earth

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Speed at which a satellite will fly off into space

Above 11,200 m/s

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Speed at which a satellite will fall towards the Earth

Below 7600 m/s

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Geostationary satellite

A satellite that orbits the Earth at the same rate as the Earth rotates

<p>A satellite that orbits the Earth at the same rate as the Earth rotates</p>
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How long it takes for a geostationary satellite to orbit the Earth

24 hours

<p>24 hours</p>
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Position of a geostationary satellite relative to the Earth's surface

It remains above the same place on the Earth's surface

<p>It remains above the same place on the Earth's surface</p>