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## Homework Statement

http://www.brainmass.com/homework-help/physics/electromagnetic-theory/98519

That site has the diagram of the Lab and distances.

R

_{g-r}=sqrt 3.709

^{2}+ .533

^{2}= 3.75

F

_{g-r}= K(q

_{1})(q

_{2})/R

_{g-r}

^{2}= (8.99x10

^{9})(1x10

^{-5})(1x10

^{-5})/3.75

^{2}= .064

angle 1 = tan

^{-1}(.533/3.709) = 8.18 degrees

R

_{b-r}=sqrt 2.553

^{2}+ 2.709

^{2}= 3.72

F

_{b-r}= K(q

_{1})(q

_{2})/R

_{g-r}

^{2}= (8.99x10

^{9})(1x10

^{-5})(1x10

^{-5})/3.72

^{2}= .065

angle 1 = tan

^{-1}(2.533/2.709) = 43 degrees

Fx

_{g-r}= (.064)Cosine8.18 = .063

Fy

_{g-r}= (.064Sine8.18 = .009

Fx

_{b-r}= (.065)Cosine43 = .048

Fy

_{b-r}= (.065)Sine43 = .044

Fx = .063 + .048 = .111

Fy = .009 + .044 = .053

Force = sqrt of .111

^{2}+ .053

^{2}= .123N

Angle = tan

^{-1}(.64/.65) = 45 degrees + 8.18 = 53 degrees to the + X

The lab shows that the total Force = .185N

Where did I go wrong??