Two identical moonlets orbit the same planet

PHYSICS · Subjective · CBSE · Physics · Gravitation · Gravitation

Problem

Two identical moonlets orbit the same planet. Moonlet A has an orbital radius of

2.0\times10^{7}\,\text{m}

, while Moonlet B orbits at

5.0\times10^{7}\,\text{m}

. Determine the ratio of the magnitude of the gravitational binding energy per unit mass of Moonlet A to that of Moonlet B.