The **second cosmic velocity** or escape velocity is the minimum velocity that must be communicated to a body so that, without the action of other additional forces, it can overcome the attraction of the __Earth__ and become an artificial satellite of the __sun__ .

This velocity is also called parabolic, because it corresponds to a parabolic path of the body in the Earth’s __gravitational__ field (in the absence of resistance from the __atmosphere__ ).

Summary

[ hide ]

- 1 Calculation
- 2 See also
- 3 External links
- 4 Sources

Calculation

The second cosmic velocity is determined by the formula:

Where

- Vesc is the second cosmic speed.
- G is the gravitational constant.
- Mt is the mass of the Earth.
- r is the distance from the launch point of the body to the center of the Earth.

On the Earth’s Surface Vesc = 11.2 Km / s