Question

charges of +2uc,+3uc,and -8uc are placed at the vertices of an equilateral triangle of side 10cm.
calculate the magnitude of the force acting on the -8uc charge due to the other two charges.?
bobpursley
make a coordinate system with one leg the x axis, -8uc at the origin. Now calculate the force (kqq/r^2) in x,y components for each of the two forces, then combine the x's and y forces t get the resultant. Magnitude will be sqrt (fx^2 + fy^2)

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