Escape Velocity

Escape velocity is the velocity that one must reach in order to leave the gravitational influence of a massive body. This can be calculated with the following formula:

Ve = Sqrt(2GM/r)

Where:

G = Gravitational constant of 6.6743 × 10-11 M = Mass of the body in kilograms r = Radius of the body in metres

On Earth, this is equal to 11,186 m/s, 25,020 mph, or 40,270 km/h.