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itryphysics

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## Homework Statement

Three positive charges are arranged in a rectangle. The charge in the bottom left corner is +5.63 nC, in the top left corner is +5.64 nC, and in the bottom right corner it is +11.28 nC. The sides have a length of 0.639 m and .213 m. Find the magnitude of the electric field at the fourth corner of the rectangle. Answer in units of N/C.

## Homework Equations

E = kq / r^2

## The Attempt at a Solution

E for bottom left : k(q) / (.67356m)^2 = 111.53 N/C

E for top left : kq/ (.213m)^2 = 1117.28 N/C

E for bottom right : kq / (.639m)^2 = 248.284 N/C

Then I drew these Electric fields on an x-y axis and they all ended up in quadrant one. So I then found the x an dy components of each. Ex total was 1196.14 and Ey total was 327.148

Finally I found the Electric field for 4th corner by using the x and y compoenents and it turned out to be 1240.07 N/C .

for some reason I am not wholly assured that my answer is correct. Can you please look over and tell me if there is anything wrong with my problem solving approach. Thank you very much =]