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Gravitation
Acceleration due to Gravity – Variation with Depth
1 question from 1 paper, each with its answer.
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- years asked, 2017–2026
- 1 of 10
- of Gravitation
- 1.52%
Concepts tested
- weight at half the depth to the centre
All Questions
2019 1 question
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A body weighs 200 N on the surface of the earth. How much will it weigh half way down to the centre of the earth?Acceleration due to gravity at depth $d$: $g'=g\left(1-\frac{d}{R}\right)$ Multiplying by $m$: $mg'=mg\left(1-\frac{d}{R}\right)$ Half way down, $d=\frac{R}{2}$: $mg'=200\left(1-\frac{R}{2R}\right)=100\ N$