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Potential Energy of an Object at a Height

Two satellite...

Question

Two satellites of mass m and 2m are revolving in two circular orbits of radii r and 2r around an imaginary planet on the surface of which gravitational force is inversely proportional to the distance from its centre. The ratio of orbital speed of satellites is

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Solution

Gravitational force is inversely proportional to the distance from its centre. The ratio of the orbital speed of satellites is 1:1.

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