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What will be the acceleration due to gra...

What will be the acceleration due to gravity at a distance of 3200 km below the surface of the earth ? (Take `R_(e)=6400` km)

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The correct Answer is:
`4.9 m//s^(2)`
`g = g(1-d/(R_(a))) ` (Take d = 3200 km and `R_(e)=6400 ` km)
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