The mean radius of the Earth may be taken as 6.4×106m.
(a) By what depth d below the surface should one descend so that the value of g is reduced by 2% of its surface value?
(b) At what height h above the surface will the value of g be reduced by the same 2%? (Take h≪Earth’s radius.)
(c) Compare the numerical values obtained in (a) and (b) and comment briefly on the result.