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kuduosinichi
At what height from surface of earth, acceleration due to gravity becomes g/2 ?
\[\frac{ g }{ 2}=\frac{ GM }{2R ^{2} }= \frac{ GM }{(R+h) ^{2} }\rightarrow h=R(\sqrt{2}-1)= 2639 km\]
2.6km aproximately
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