Points A and B have electric potentials of 310 V and 200 V, respectively. When an electron released fromrest at point A arrives at point C, its kinetic energy is K_{\rm{A}}. When the electronis released from rest at point B, however, its kinetic energy whenit reaches point C is K_{\rm{B}} = 2K_{\rm{A}}.
What is the electric potential at point Cand what is the kinetic energy K_{\rm{A}}?
