Net force on particle 1 due to particle 2 in vector form?

[Corey Bacon]

Homework Statement

Hi all,
I have this quiz on MasteringPhysics, but I can't seem to get the right answer.[/B]
Consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). What is the net force F⃗ on particle 0 due to particle 1?
Express your answer (a vector) using any or all of k, q0, q1, d1, i^, j^, and k^.

If someone wouldn't mind giving me some advice, I would much appreciate it.
Thanks

Homework Equations

Columns Law

The Attempt at a Solution

$$\frac{kq_0q_1}{d_1^2}j$$

 

[Fightfish]

The direction of the force is important too.

 

[Qwertywerty]

Force on q₀ by q₁ acts in which direction ?

 

[tommyxu3]

You have write down the part of the answer.
The complete Coulomb law is:
$$\vec{F_{12}}=\frac{kq_1q_2}{r_{12}^2}\vec{e_{12}}$$
for $\vec{F_{12}}$ is the force $q_1$ makes on $q_2$ and $e_{12}$ is the unit vector from $q_1$ toward $q_2.$
It may help you find out the correct direction of the force.

 

[Pyrus]

and putting r(cap) = r(vector)/r