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Gravitational Field
Strength
Introduction
Gravitational field strength describes the force experienced per unit mass at a point in a gravitational field. It allows students to understand how gravity varies with distance from a massive object and forms the basis for analysing planetary motion, satellite orbits and gravitational interactions. This topic also introduces the relationship between gravitational field strength and Newton's Law of Gravitation.
AQA A Level Physics Specification: 3.7.1.2 Gravitational Field Strength
What You Need to Know
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Define gravitational field strength as the gravitational force per unit mass.
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State the unit of gravitational field strength (N kg⁻¹).
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Apply the equation relating gravitational field strength to force and mass.
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Calculate gravitational field strength around a point mass using Newton's Law of Gravitation.
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Explain how gravitational field strength varies with distance from a mass.
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Sketch and interpret graphs showing the variation of gravitational field strength with distance.
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Compare gravitational field strengths for different planets and celestial bodies.
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Solve quantitative problems involving gravitational field strength.
Downloadable Topic Pack
Gravitational Field Strength Topic Pack Exam Questions and Answers
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