Standard Books Physics Variation of g with depth MCQ Question with Solution

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?

A

125 N

B

150 N

C

175 N

D

250 N

Option A

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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STANDARD Physics Variation of g with depth MCQ Question