This is a challenging problem. solve it on paper, writing out each step carefully. when doing calculations, do not round intermediate values. note: if you have approached the problem in a principled way, do not abandon your approach if your numerical answer is not accepted; check your calculations! a particle with mass and charge and its antiparticle (same mass , charge ) are initially at rest, far from each other. they attract each other and move toward each other. (c) if instead, when the particles were far from each other, they were not at rest, but were moving toward each other with the same nonzero speed, which of the diagrams in part (a) would correctly show the energy of this system as a function of separation?