Distance form the earth's surface: Gravitational potential/MJkg-1(adsbygoogle = window.adsbygoogle || []).push({});

0 : -62.72

400000 : -59.12

Deduce the earth's gravitational field strength at a height of 400000m.

Since g=-GM/r^2 and V=-GM/r , I tried to solve this question using V/r. But I failed to get the correct answer. Any suggestion on how to approach the question?

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# Homework Help: Deduce gravitational strength

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