What is escape velocity?
Escape velocity is the speed that an object needs to be traveling to break free of a planet or moon's gravity well and leave it without further propulsion. For example, a spacecraft leaving the surface of Earth needs to be going 7 miles per second, or nearly 25,000 miles per hour to leave without falling back to the surface or falling into orbit.
Formula Used :
\[v = \sqrt{\frac{2GM}{R}} \]
where , G = gravitational force
M = mass of the object.
R = distance between the objects
The equation can also be written considering the initial altitude of the escaping object:
\[v = \sqrt{\frac{2GM}{r + h}} \]
where ,r is the radius of the celestial body in km.
h is the altitude or separation from the surface of the body in km.
v is escape velocity in km/s
