Question

What is Variation in Acceleration due to Gravity (g)?

Answer

Variation in Acceleration due to Gravity (g) - The value of g is variable and can vary in some cases as mentioned below (R is treated to be radius of the earth, i.e. 6400 km) (i) Variation in g with the altitude (height) from the earth's surface - The new value of g at altitude (height) h form the earth's surface, is g' = g/(1 + h/R)² and if h << R, then [g' = g(1 - 2h/R)] (ii) Variation in g with depth inside the earth - The new value of g at a plane inside the earth with depth h from the earth's surface, is [g' = g(1 - h/R) ] (iii) Variation in g due to rotation of the earth - The new value of g at point p with latitude θ is g' = g - ω²R cosθ

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