1.

find theacceleration due to gravity in a mine depth of 640m if the value at the surface is 9.8m/s.The radius of the earth is 6400km

Answer»

The depth, d = 640 m

The radius of the earth, R = 6400 km = 6.4×106 m

The value of acceleration due to gravity at the SURFACE of the earth, g = 9.8 m/s2

Therefore, the acceleration due to gravity at the depth of 640 m



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