Point A is at a potential of +240 V, and point B is at a potential of -120 V. An -particle is a helium nucleus that contains two protons and two neutrons;
the neutrons are electrically neutral. An -particle starts from rest at A and accelerates toward B.
When the -particle arrives at B, what kinetic energy (in electron volts) does it have?
need help please.
Ek is the kinetic energy
Va is the potential at A
Vb is the potential at B