Acceleration due to Gravity on a Spherical Body (g = GM/R²)
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g = GM/R²
What each symbol means
| Symbol | What it stands for |
|---|---|
| G | Gravitational constant |
| M | Mass of planet (kg) |
| R | Radius of planet (m) |
| g | Magnitude of gravitational acceleration near surface (m/s²) |
When to use this
Point just outside surface; planet treated as spherically symmetric. g is magnitude of field at surface.