Escape from gravitational field

[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

Homework Equations

v= root gh

The Attempt at a Solution

Sorry, i don't have any solution .

 

[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?

 

[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 $h \rightarrow \infty$