Two point charges, each of mass m and charge q are released when they are at a distance from each other. What is the speed of each charged particle when they are at a distance 2r ?

Explanation

According to momentum conservation both the charge particles will move with same speed applying energy conservation.

`0 + 0 + (Kq^(2))/(r ) = 2(1)/(2)mv^(2) + (Kq^(2))/(2r)`
`rArr v = sqrt((Kq^(2))/(2rm))`