Four identical particles of mass M are located at the corners of a square of side 'a'. What should be their speed if each of them revolves under the influence of others gravitational field in a circular orbit circumscribing the square

Question:

Four identical particles of mass M are located at the corners of a square of side ‘a’. What should be their speed if each of them revolves under the influence of others gravitational field in a circular orbit circumscribing the square

Options :

(a) 1.16 √GM/2
(b) 1.41 √GM/2
(c) 1.21 √GM/2
(d) 1.35 √GM/2

Answer :

(a) 1.16 √GM/2

Answer Steps :

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