Escape velocity & surface gravity

modified2026-07-21statusfinished

Surface gravitational acceleration and escape velocity for a planetary body.

[9.11] Governing equations

$$g=\frac{GM}{R^2},\quad v_{\text{esc}}=\sqrt{\frac{2GM}{R}}$$

$G=6.674\times10^{-11}\ \text{m}^3\text{kg}^{-1}\text{s}^{-2}$. Source: 1728 Software Systems.

FIG. 01 — surface radius R, escape velocity vector v_esc

Preset body Mass M (kg) Radius R (m)

Surface gravity g	—
Escape velocity	—