If three particles, each of mass M are placed at the three corners of an equilateral triangle of side a, the force exerted by this system on another particle of mass M placed at the midpoint of a side is

If three particles, each of mass M are placed at the three corners of

1.	If three particles, each of mass M are placed at the three corners of an equilateral triangle of side a, the force exerted by this system on another particle of mass M placed at the midpoint of a side is
A.	4GM2 / 5a2
B.	4GM2 / 3a2
C.	2GM2 / 3a2
D.	2GM2 / 5a2
Answer» C. 2GM2 / 3a2

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If three particles, each of mass M are placed at the three corners of an equilateral triangle of side a, the force exerted by this system on another particle of mass M placed at the midpoint of a side is

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