Coulomb force

1. Jun 20, 2007

black_kitty

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?

2. Jun 20, 2007

G01

But whats more what? I don't understand what your question is.