Three equal positive charges Q are placed at the vertices of an equilateral triangle..... the force on the centroid = 0. why?

Question

Three equal positive charges Q are placed at the vertices of an equilateral triangle.....  the force on the centroid = 0. why?

anonymous · Answer

What happens if you push with the same force in opposite directions?

anonymous · Answer

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anonymous · Answer

Yes. What does this net out to?

anonymous · Answer

the force on the centre is to be found

anonymous · Answer

it is 0
it it as they are include at 120

anonymous · Answer

net force =0

anonymous · Answer

Correct. Well done. They could also have been directed inward with same net result.

anonymous · Answer

Must go.

anonymous · Answer

so its because they are inclined at obtuse angle

anonymous · Answer

?

mrdoe · Answer

it is because of the symmetry of the problem, the same thing would happen if you had a perfect square with a charge at each corner etc, as long as all the angles and charges are equal, the forces will cancel in the center (this is simplistic but i hope it gives you the right idea)

gudden · Answer

Please close this question...!