calculate the netforrce on q2?

Question

calculate the netforrce on q2?
calculate the net force on q3?
q1=+3.0 MC
q2=+3.0MC
q3=-6.0MC

q1-------20cm-------------q2
                                           I
                                           I
                                           I
                                       50 cm
                                           I
                                           I
                                           I
                                         q3

Damon · Answer

Hey, just use Coulomb's Law F = k Q1 Q2 / d^2 if like charges, repel if opposite signs, attract see: http://en.wikipedia.org/wiki/Coulomb's_law

Chanz · Answer

And remember, you're adding VECTORS. You can't just add the two numbers. They have directions as well.