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0 of 4 objectives have lessons · 0 studied · 0 secure
Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand that, at points outside a uniform sphere, the sphere’s mass can be treated as a point mass at its centre.
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Recall and use Newton’s law of gravitation, F = Gm₁m₂ / r², for the force between two point masses.
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Analyse circular orbits in gravitational fields by linking the gravitational force to the centripetal acceleration that it produces.
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Understand that a satellite in a geostationary orbit circles directly above the Equator, from west to east, with an orbital period of 24 hours, so that it stays above the same point on the Earth’s surface.
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