Problem:(adsbygoogle = window.adsbygoogle || []).push({});

Calculate the distance from the center of the Earth to a point below the surface where the acceleration due to gravity is 0.50g, where g is the acceleration due to gravity at the Earth's surface.

I am really stuck on this. I tried using T^2 = 4pi^2 / GMe *r^3

but it didnt work it could be because M is supposed to be the mass of the sun but I decided it should be the mass of the earth! But it wasnt, it didnt work. I just cant seem to find a way to relate Keplers Laws to this problem. Are there other equations I could use?

Thanks in advance!

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# Homework Help: Earth and Gravity help

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