At a height h above Earth's surface where h ≪ R, g' equals:
Ag (1 + 2h/R)
Bg (1 - 2h/R)
Cg (1 + h/R)
Dg (1 - h/R)
Answer & Solution
Correct answer: B. g (1 - 2h/R)
g' = g (R/(R+h))². For h ≪ R, binomial expansion gives g' ≈ g (1 - 2h/R). So g decreases linearly with small height.
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