Gravitational Field due to a Point Mass (E = GM/r²)
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E = GM/r²
What each symbol means
| Symbol | What it stands for |
|---|---|
| E | Magnitude of gravitational field (N/kg) at distance r from point mass M |
| G | Universal gravitational constant |
| M | Source mass (kg) |
| r | Distance from centre of M to field point (m) |
When to use this
Outside a spherically symmetric body, external field equals that of point mass M at centre.