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Homework Statement
1) A satellite is in circular orbit around the sun. Which requires the greater change in satellite's speed: to escape the solar system or fall into the sun?
Homework Equations
The Attempt at a Solution
Ok so am i right in thinking that the velocity of such a satellite in circular orbit is root GM/(R+r) where R is radius of sun, r dist above surface of sun..
so v escape is root 2GM (R+r) yes?
So it requires a change by factor of root 2.. is that right?
How do i calculate the change needed to fall into the sun?
thanks