I don't understand how to do this question. Please help(adsbygoogle = window.adsbygoogle || []).push({});

Show that GMm (1/r1 - 1/r2) and mgh are, for practical purposes, equal, when r2 is almost equal to r1 near the earths surface.

I just don't know how to do it.

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# Homework Help: Gravitational Acceleration Help

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