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## Homework Statement

Hi, I am stuck on this question:

A satellite of mass 1200 kg is in orbit around the Earth at a distance of 22000 km from the centre of the Earth.

Calculate the magnitude of the centripetal acceleration of the satellite at this distance.

## The Attempt at a Solution

I did:

mv^2/r= GMm/r^2

so v= square root of GM/r

v= square root of 6.67 x10^-11 x 6.0 x 10^24/ 22000 x 10^3

this gave me=

4.266x 10^-3 m/s but the answer at the back is 0.83 m/s^2, can someone please explain to where i went wrong.

Thanks[/B]