Four protons are placed in the vertices of a square with a side of 2 x 10-9 m. A fifth protonit is initially on the perpendicular to the square by its center, at a distance of 2 x 10-9 m from it. Calculate (a) theminimum initial velocity that the fifth proton needs to reach the center of the square, (b) its initial and final accelerations.(c) Make a graph of the proton's potential energy as a function of its distance to the center of the square.
