With what initial speed should a positive charge, +q, of mass mbegiven such that if starting infinitely far away from a fixed positively charged nucleus, +Q,of radius R, the positive charge is justable to get the surface of the positive charge. You should be able to do the problem using energy with a system just being the approaching charge and then the system being both charges

With what initial speed should a positive charge, +q, of mass mbegiven such that if starting infinitely far away from a fixed positively charged nucleus, +Q,of radius R, the positive charge is justable to get the surface of the positive charge. You should be able to do the problem using energy with a system just being the approaching charge and then the system being both charges