Exploring the Coulomb Force: Vectorial & Non-Vectorial Forms

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black_kitty
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I must comment on the Coulomb force - vectorial & non-vectorial form:

F=k*((Q1*Q2)/r^2 )
F=k*((Q1*Q2)/r^2 )*[r] >>>[r] unit vector

I know that , in case of vectorial form, I can use superposition principle, and use this form when the direction is important for me.
But what's more?
 
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