Assuming earth to be a sphere of a uniform density, what is the value of gravitational acceleration in a mine 100 km below the earth’s surface (Given R = 6400 km)

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9.66 m/s2

7.64 m/s2

5.06m/s2

3.10 m/s2

answer is A.

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Detailed Solution

g'=g 1−dR=9.8 1−1006400=9.66 m/s2

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