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Question

Three particles of identical masses m are kept at the vertices of an equilateral triangle of each side length a. The gravitational force of attraction on any one of the particles is:

A
2Gm2a2
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B
3Gm2a2
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C
3Gm2a2
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D
2Gm2a2
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Solution

The correct option is C 3Gm2a2
Fnet=(F21+F22+2F1F2cosθ)
Here, F1=F2=Gmmr2 and θ=600
Therefore, on solving we get, Fnet=3Gm2a2

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