Escape Speed from Surface (ve = √(2GM/R) = √(2gR))
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ve = √(2GM/R) = √(2gR)
What each symbol means
| Symbol | What it stands for |
|---|---|
| R | Planet radius |
| g | Surface GM/R² |
| v_e | Minimum launch speed from surface to reach ∞ with zero residual speed |
When to use this
No atmosphere drag; spherical body; from surface. ve = √2 × v_circular at surface.