Gravitation Question 45

Question: If radius of earth is R then the height ?h? at which value of ?g? becomes one-fourth is[BHU 2000]

Options:

A) $ [\frac{R}{4}] $

B) $ [\frac{3R}{4}] $

C) R

D) $ [\frac{R}{8}] $

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Answer:

Correct Answer: C

Solution:

$ [g’=g{{\left( \frac{R}{R+h} \right)}^{2}}=\frac{g}{4}] $ . By solving h = R



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