STANDARD Physics Variation of g with depth MCQ Question
A body weighs 250 N on the surface of the Earth. How much will it weigh half way down to the centre of the Earth?
125 N
150 N
175 N
250 N
Correct Answer
Detailed Explanation
The weight of a body at a depth d below the surface of the Earth is given by W' = mg(1 - d/Rₑ). At half the radius, d = Rₑ/2, so W' = mg/2 = 125 N.
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