Mon March 04, 2013 By:
To calculate the acceleration due to gravity at a given height which formulae must be used?
i) g(at a height 'h')/g  =  (R/R+h)^2

Which of the formulae must be used for the given question?

Expert Reply
Mon March 04, 2013
For large distances like: height    R/2 or R/3 or R and so on from the surface of earth we should use the first formula where no assumptions are taken.
Where as in other cases: for not so large heights, like: upto hundreds of km we should be using second formula.h<<R
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