- #1

dkgojackets

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## Homework Statement

Find the energy required to launch a satellite from Earth into circular orbit at radius 5Re in units of joules.

Msat = 1000 kg

Me = 5.98e24 kg

Re = 6.37e6

G = 6.67259e-11

## Homework Equations

F = GMm/(r^2)

## The Attempt at a Solution

I'm thinking somehow using conservation of forces, ending up with (mv^2)/r, and that v can be used to find final kinetic energy, which can be added to potential energy found using mgh, where g = GM/(r^2). I don't know how to get there though.