# Gravitational field strength

Show/Hide Sub-topics (Gravitation | A Level)

Gravitational field strength at a point is defined as the gravitational force per unit mass acting on a mass placed at that point.

$$g = \frac{F}{m}$$

$$g = G \frac{M}{r^{2}}$$

Units of g is $N \, kg^{-1}$ or $m \, s^{-2}$.

It is independent of test mass.

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