# Escape Velocity / Speed Tutorial

## Escape Velocity / Speed Tutorial

#### Escape Velocity:

Escape Velocity is the minimum velocity needed to escape the gravitational field of a planet or other body. It is also called as Critical or Escape Speed.

#### Escape Velocity:

###### where,
G = Universal Gravitational Constant = 6.6726 x 10-11N-m2/kg2 M = Planet Mass R = Planet Radius

#### Escape Velocity Examples:

Case 1: What is the escape velocity on earth with respect to Earth's gravity? Mass of the earth = 5.98x1024kg, R = 6378100 m, G = 6.6726 x 10-11N-m2/kg2.

###### Step 1:

Substitute the values in the below Escape Velocity formula:

This example will guide you to calculate the Escape Velocity manually. Case 2: Determine the Mars mass, where the escape velocity of mars is 5 x 103. Radius of Mars = 33.97 x 105 kg, ve = 5 x 103, G = 6.6726 x 10-11N-m2/kg2.

###### Step 1:

Substitute the values in the below Mass formula:

This example will guide you to calculate the Mass of the Mars manually.

#### Related Topic:

This tutorial will help you dynamically to find the Escape Velocity problems.