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Variation in Acceleration due to Gravity (g) #8211; The value of g is variable and can vary in some casses 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)<sup>2</sup> and if h lt;lt; R, then [g#039; = g(1 #8211; 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#039;s surface, is [g#039; = g(1 #8211; 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#039; = g #8211; ω<sup>2</sup>R coslt;sup2</sup>θ
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