AQA A-level Physics - Gravitational fields

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Across
  1. 5. Gravitational forces are inversely proportional to this.
  2. 6. The mutual gravitational forces are directly proportional to the _______ of the masses.
  3. 8. The total energy of a satellite is always this.
  4. 9. The minimum velocity an object must be projected at to be removed from an planet's field.
  5. 10. The place where gravitational potential energy is defined as being zero.
  6. 12. The force per unit mass of a gravitational field.
  7. 13. The astronomer who linked orbital time to orbital radius.
  8. 15. When field lines are parallel and evenly spaced.
  9. 16. Gravitational forces are always this.
  10. 17. These produce gravitational fields.
Down
  1. 1. Adjective used to describe masses when defining gravitational field properties.
  2. 2. Always staying above the same place on the Earth's equator.
  3. 3. The acceleration of a satellite.
  4. 4. A physicist who determined the value of G.
  5. 7. A surface in which the energy due to positive is constant, per unit mass.
  6. 11. Adjective used to describe masses when defining gravitational field properties.
  7. 14. The types of masses described in Newton's law of gravitation.