Escape Velocity

What is Escape Velocity?

Escape velocity is defined as the speed require the object to escape from the gravitational attraction of the planet or celestial body.

Escape velocity is different for different celestial bodies and to calculate that we require an object’s Mass (M), Gravitational constant (G), and radius of that body (r). The formula is used to calculate escape velocity is given as below,

Ve= √(2GM/r)

Where G = Gravitational constant
M = Mass of that body
r = Radius of that celestial body

For our home planet Earth escape velocity is 11.2 km/sec, it means if we throw a ball into the sky with speed of 11.2 km/sec then that ball will never come on earth’s surface. It will be free from earth’s gravitational pull.

Similar to earth, escape velocity for the other celestial body is given as below,

PlanetsEscape velocity in km/sec
Mercury4.3
Venus10.4
Earth11.2
Mars5.0
Jupiter60.2
Saturn35.5
Uranus21.3
Neptune23.5
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