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Question

At what height, the value of 'g' is half that on the surface of the earth of radius R?
  1. R
  2. 0.414R
  3. 2R
  4. 0.75R

A
2R
B
0.414R
C
0.75R
D
R
Solution
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We have, g=GMr2; r is the distance from the centre of Earth.
g1r2 above the surface of the earth.
gsgh=r2hr2s

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