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**1. Homework Statement**

**2. Homework Equations**

It's given in the answer box.

**3. The Attempt at a Solution**

Basically, I found that equation for the magnitude of the force experienced from particle 0 by particle 3. I know it to be correct. However, vectors have always confused me, could anybody bump me in the right direction on how to label the equation appropriately with vectors? (using y hat and z hat). The distance between particle 0 and 2 is d2, and between particle 2 and 3 is d3. So it's a 45* angle at the hypotenuse.

Would it be F = (kq0q3)y/(sqrt(2d2^2)z)? Thanks!