What Happens to the Force on Charged Particles When They Move Apart?

[comtngal]

When a positive and negative charge are held close to each other and then released, does the force on each particle increase, decrease, or stay the same?

 

[emptymaximum]

when you release the particles, what happens?
recall coulombs law:
$$\vec{F} = \frac{1} {4 \pi \epsilon_0} \frac{q_1 q_2} {r^2} \hat{r}$$