Sub-topic 1
2024 · National Quarterfinal
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Variation of weight with height above the earth's surface
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Sub-topic 2
2026 · National Preliminary
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Variation of weight with height above the earth's surface
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Sub-topic 3
2024 · National Preliminary
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Variation of weight with location on earth: poles, altitude and free fall (true/false)
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Sub-topic 4
2025 · National Preliminary
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Gravitational force between two point masses (newton's law of gravitation)
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Sub-topic 5
2026 · National One-Eighth
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Gravitational field strength from escape velocity
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Sub-topic 6
2026 · National Quarterfinal
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Focus-directrix property of a parabolic orbit about earth
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Sub-topic 7
2026 · National Quarterfinal
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Eccentricity of an elliptical orbit from its semi-major and semi-minor axes
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Sub-topic 8
2026 · National Preliminary
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Riddle: jupiter
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Sub-topic 9
2025 · National One-Eighth
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Orbital motion at perihelion: distance, speed and direction (true/false)
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Sub-topic 10
2012 · National Preliminary
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Orbital period of a geostationary satellite and escape velocity comparison (moon vs earth) (true/false)
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Sub-topic 11
2013 · National Quarterfinal
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Riddle: gravity as a universal attractive force
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Sub-topic 12
2013 · National Semifinal
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Gravity as a long-range force, and gravitational force proportional to mass (true/false)
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Sub-topic 13
2014 · National Quarterfinal
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Linearizing the inverse-square gravitational force law for graphing
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Sub-topic 14
2014 · National Final
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Gravitational work around a closed path is zero, not proportional to path length (true/false)
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Sub-topic 15
2017 · National Quarterfinal
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Escape velocity, radius and surface gravity relationships for celestial bodies
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Sub-topic 16
2019 · National Preliminary
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Surface gravitational field strength of an isolated sphere from its mass and radius
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