Gravitation Question 27

Question: At what altitude in metre will the acceleration due to gravity be 25% of that at the earth’s surface (Radius of earth = R metre)[ISM Dhanbad 1994]

Options:

A) [14R]

B) R

C) [38R]

D) [R2]

Show Answer

Answer:

Correct Answer: B

Solution:

[g=g(RR+h)2]

Þ [g4=g(RR+h)2]

Þ [12=RR+h] Þ[R+h=2R] \ [h=R]



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