Force on 3uC Charge - Solving Coloumb's Law Problem

[Ember Cult]

Homework Statement

Find force on 3uC charge.

Homework Equations

The Attempt at a Solution

Assuming the 3uC charge is at point A and others are at point B and C

FA = FAB + FAC
FAB = K*(2*3)/5
FAC = K*(2*3)/5

 

[ehild]

Homework Statement

Find force on 3uC charge.

Homework Equations

The Attempt at a Solution

Assuming the 3uC charge is at point A and others are at point B and C

FA = FAB + FAC
FAB = K*(2*3)/5
FAC = K*(2*3)/5

Remember, force is vector. The two forces exerted on the 3uC charge have different directions. Add them by their horizontal and vertical components.
The magnitude of the Coulomb force is inversely proportional to the square of the distance. Correct your formulas.

 

[azizlwl]

Remember, force is vector. The two forces exerted on the 3uC charge have different directions. Add them by their horizontal and vertical components.
The magnitude of the Coulomb force is inversely proportional to the square of the distance. Correct your formulas.

Your relevant equation should include unit vector of r. Calculating 2 charge particles is not a problem but not in 3D or many particles in 2D.