# Electric Field strength between 3 charges and directions

1. Mar 27, 2014

### need_aca_help

1. The problem statement, all variables and given/known data
Three point charges lie along a straight line as shown in the figure below, where
q1 = 6.36 µC, q2 = 1.57 µC and q3 = −1.82 µC.
The separation distances are d1 = 3.00 cm and d2 = 2.00 cm.
Calculate the magnitude and direction of the net electric force on each of the charges.

2. Relevant equations

3. The attempt at a solution
I think I have to use vectors but I don't know how...

2. Mar 27, 2014

### BvU

Well, what equations do you have at hand to tackle this problem ?

3. Mar 27, 2014

### need_aca_help

I'm not very good with electricity...

F = Eq
E = -(dv/dx)

4. Mar 27, 2014

### BvU

So you still need an expression for either V or $\vec E$, right ?

5. Mar 27, 2014