# What is the distance of the third charge?

## Homework Statement

Three point charges, 3.0 $$\mu$$c, -5.0$$\mu$$c and 0 $$\mu$$c.

If the distance from point 1 (3.0) and point 2 (-5.0) is 40m, what is the distance from point 2 to point 3?

coulombs law

[b

## The Attempt at a Solution

I don't know how to start this :(

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rl.bhat
Homework Helper
The problem is not clear. Whether the third body is neutral?
Are they in equilibrium?

I'm not really sure since I only remembered this problem by memory :( but if the third body WAS neutral and they ARE in equilibrium, how would you answer this? :D

rl.bhat
Homework Helper
I'm not really sure since I only remembered this problem by memory :( but if the third body WAS neutral and they ARE in equilibrium, how would you answer this? :D
If the third body WAS neutral and they cannot be in equilibrium

If the third body WAS neutral and they cannot be in equilibrium
um, if that's so, is it then possible to be solved?

I need to use this formula :D ?

Fe = $$\frac{ Kq1q2 }{ r2 }$$

ideasrule
Homework Helper
No. Just think about it. If the third body is neutral, the other two would attract each other, accelerate towards each other, and eventually collide.