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Orbital Motion, Natural And Artificial Satellites (physics Only) (GCSE Physics)

The following is a GCSE Physics test covering 'Orbital Motion, Natural And Artificial Satellites (physics Only)' from the broader topic Space Physics. The test is geared towards the AQA exam board style syllabus.
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What must a spacecraft reach or exceed to escape permanently from a planet’s gravitational field (neglecting other forces)?
For a satellite in a circular orbit, which property remains constant as it orbits?
A geostationary satellite has an orbital period equal to Earth’s rotation period. What is that period (approximately)?
Which of the following is a natural satellite of Earth?
Which of these is a characteristic of a geostationary orbit?
What provides the centripetal force that keeps an artificial satellite in orbit around Earth?
A satellite is any object that orbits a planet or other body in space.
Near Earth, how does the gravitational field strength g change as distance from Earth’s centre increases?
Why do GPS satellites require extremely accurate and stable clocks on board?
Which orbit is most commonly used for Earth observation satellites that need high spatial resolution?
If the speed of a satellite in a circular orbit is reduced slightly, what happens to its path?