1. The problem statement, all variables and given/known data Three identical particles, each possessing mass m and charge +q, are placed at the corners of an equilateral triangle with side r. The particles are simultaneously set free and start flying apart symmetrically due to coulomb's repulsion forces. The work performed by Coulomb's forces acting on each particle until the particles fly from one another to a very large distance is -- 2. Relevant equations 3. The attempt at a solution According to the work energy theorem, ΔKE = W Also ΔKE of one particle = 2kq^2/r So, ΔKE of all three particles = 6kq^2/r Hence, W = 6kq^2/r However, the answer given is kq^2/r What have I done wrong?