Solve the all parts of following problem given below:
Problem: Four equal particles with positive charge q = 14.418 x 10-19 C and mass m = 81.99x10-31 kg are initially held at the four corners of a square of side L = 0.07 m.
Part I: What is the total electric potential at the center of the square?
(in V)
Part II: If these particles are released simultaneously, what will be their speed when they have separated by a very large distance? You may neglect gravitational effects.
in (m/s)
I don't just need an answer, work and explanations/walkthrough would be much appreciated! Thanks.