# Homework Help: Electric Field homework help

1. Jun 9, 2013

### bryanwalsh

1. The problem statement, all variables and given/known data
Find the direction of E at rho where is the electric field

http://i.imgur.com/37ohyME.jpg

2. Relevant equations

F=KQq/r^2

3. The attempt at a solution

I thought I might just have a vector pointing right from the +2Q and another pointing up from the +3Q and just add those two vectors together but I'm not sure.

2. Jun 9, 2013

### tiny-tim

hi bryanwalsh! welcome to pf!

(try using the X2 button just above the Reply box )
that's correct … electric fields are vectors, so they add like vectors

3. Jun 10, 2013

### bryanwalsh

So which way would the direction vector face? Southeast?

4. Jun 10, 2013

### bryanwalsh

So which way would the direction vector of the electric field face? Southeast?

5. Jun 10, 2013

### tiny-tim

maybe yes and maybe no

tell us why you think it's southeast (with equations), and then we'll comment

6. Jun 10, 2013

### bryanwalsh

7. Jun 11, 2013

### tiny-tim

(just got up :zzz:)

if one vector is up, and the other is horizontal, how can the resultant be down??

you need to draw a much better diagram, with arrows to show which way the vectors are going

or, preferably, use components