Question

If radius of earth is R then the height ?h? at which value of ?g? becomes one-fourth is [BHU 2000]
A) \frac{R}{4} B) \frac{3R}{4} C) R D) \frac{R}{8}

Answer 1

The value of g' at a height h from the surface of earth when compared to the radius of earth is
g'÷g=(R) ^2÷(R+h) ^2
From where we get the value of h is R after putting g÷4 un the position of g'..