On this problem: http://www.cramster.com//answers-jun-08/physics/square-point-ch

Question

On this problem:

http://www.cramster.com//answers-jun-08/physics/square-point-charges-form-square-sides-length_279328.aspx#post-329321-comment-17008

I don't understand why the distance from the center to any point is d/squar root 2.

can someone please explain this to me. On this problem:

http://www.cramster.com//answers-jun-08/physics/square-point-charges-form-square-sides-length_279328.aspx#post-329321-comment-17008

I don't understand why the distance from the center to any point is d/squar root 2. can someone please explain this to me.

Explanation / Answer

   from the figure it is clear that it is a square with side d using Pithogarous theorem its diagnol will be v2(d) since the center is at a distance half of the diagnol from the each corner its distance is  v2(d)/2=d/v2

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