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CAIE A-Level Physics A2 13.3 Gravitational Field of a Point Mass Questions

Practise deriving and applying g = GM/r² for an isolated mass, comparing field strength at different radii and explaining the near-surface constant-g approximation.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • derive and apply g = GM/r² for a point-mass field
  • compare field strength at different radii and explain the near-surface constant-g approximation

Covered syllabus points

13.3.1—Derive, from Newton’s law of gravitation and the definition of gravitational13.3.2—G = GM / r 213.3.3—G is approximately constant for small changes in height near the Earth’s

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