“Referring to HC Verma Part 2, chapter 29, Electric field and potential, Q 69 I think that Force is inversely proportional to square of the distance between the charged particles, so acceleration is not constant and hence v*v = u*u + 2*a*s is not valid in this case. [...]
Problems from H C Verma‘s Concepts of Physics is considered a must work out assignment by most of the IIT aspirants.
Here you can find the solutions to the problems chapterwise. The downloads are