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Two identical particles each of mass ‘m’ go round a circle of radius a under the action of their mutual gravitational attraction. The angular speed of each particle will be :

1. 3 a Gm
2. 3 a 8 Gm
3. 3 a 4 Gm
4. 3 a 2 Gm

Correct answer: 3 a 4 Gm

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