Two satellites A and B of the same mass are revolving around the earth in the concentric circular orbits such that the distance of satellite B from the centre of the earth is thrice as compared to the distance of the satellite A from the centre of the earth. The ratio of the centripetal force acting on B as compared to that on A is

Question

Infinity Learn · Accepted Answer

$$VA=GMrA$$ and $$VB=GMrB$$ Given $$rB=3rA$$ Now $$FA=mvA2rA=MrAGMrA=GMmrA2$$            $$FB=GMmrB2FBFA=rA2rB2=19$$

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