الى استاز الفيزياء مسالة فى الكهربية

[nasora77]

Two protons are held at rest, 5*10-12 m a part. When relased, they fly apart . How fast will each be moving when they are far from each other ?
(a) 2*104 m/s (b) 1.7*106 m/s (c) 1*105 m/s (d) 3*107 m/s