Gravitational Field Strength - g.
The gravitational field strength g at a point is the gravitational force per unit mass acting on a small test mass placed there, g = F/m. It is measured in N kg-1 and is a vector that points towards the mass creating the field.

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Key terms in this lesson
- gravitational field
- A region of space in which a mass experiences a force due to the presence of another mass.
- Newton's law of gravitation
- The gravitational force between any two point masses is attractive, proportional to the product of their masses and inversely proportional to the square of the distance between them.
More in Gravitational Fields
- Gravitational Potential.
- Equipotentials.
- The potential gradient.
- Newton's Law of Gravitation.
- Gravitational Potential.
- Potential Gradients
- Area Under a Force vs Distance Graph
- Satellites
All 14 lessons in Gravitational Fields · All OCR A-level Physics topics