Physicshard · Past Paper
What is the effect on the value of 'g' at a height equal to the radius of Earth?
Ag/2
Bg/4
Cg/9
D2g
✓ Correct Answer: B — g/4
At height h=R, distance from center is 2R. g' = GM/(2R)^2 = GM/4R^2 = g/4.
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