A geostationary satellite orbits the ear...

A geostationary satellite orbits the earth at a height of nearly `36000 km` from the surface of the earth. If the magnitude of potential đue to earth's gravity at the site of the satellite is `(x xx 10^(6)r) J kg^(-1)`, then find the `x`. [Mass of the carth `=6 xx 10^(24) kg` and `radius =6400km` (approximately)]

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