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)
(a) 9.66 m/s2 (b) 7.64 m/s2
(c) 5.06m/s2 (d) 3.10 m/s2
Answer: a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a