# Escape from gravitational field

1. Dec 11, 2014

### hafiz ns

1. A satellite is revolving very close to earth. what is the % increases in velocity needed to escape from the gravitational field of earth

2. Relevant equations
v= root gh

3. The attempt at a solution
Sorry, i dont have any solution .

2. Dec 11, 2014

### ehild

You have to tell us, what you know. What does escape from the gravitational field of the Earth mean? How far can the satellite go away from the Earth with the increased velocity?

3. Dec 11, 2014

### BvU

No need for a full solution on PF. But definite need to know what you do have: equations, attempted solution etc.

$v = \sqrt{gh}$ isn't good enough: need to escape from earth gravitational field, so $h \rightarrow \infty$