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There are four charges at the corners of a Square of side L. Assume q and Q are positive. what is the magnitude of the net force on q?

Physics
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|dw:1346303817582:dw|Use Coulomb's law to find each force separately. Then add the three forces (remember to use vector addition). Force (F1) on q due to 4Q is along the diagonal and hence needs to be split into its components to be added, since \[\theta=45degrees\] the components are \[F_1Sin\theta, F_1Cos\theta\]\[F_1sin45,F_1Cos45\]along Y and X axis respectively. Force(F2) on q due to -Q on the left is along the -ve x axis, and the Force (F3) on q due to -Q (right bottom corner) is along the -ve Y axis. (STEP I) find the net forces in the X and Y directions\[F_X andF_Y\] (STEP II) Use \[F_{net}=\sqrt(F_X^2+F_Y^2)\]
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