Two satellites of the earth move in the sme plane with radii a and b,b being slghtly gerater than a. what is the minimum intants when they are on the same line thourth the centre of the earth (i) when they move in the same direction ,(ii) in oppsite direction?

Answer

`(4pi)/(3sqrt(GM))(a^(5//2))/(b-a), (4pi)/(3sqrt(GM)).(a^(5//2))/(b+a//3)`