How can the energy at the beginning be zero

[seto6]

Homework Statement

Homework Equations

conservation of energy

The Attempt at a Solution

how can the energy at the beginning be zero. then get accelerated?

umm proton goes to lower potential and electron goes to higher potential? correct?

i think that electron gets pulled by the higher potential surface correct?

can some one explain

 

[Doc Al]

how can the energy at the beginning be zero. then get accelerated?

The field between the plates exerts a force on it.

umm proton goes to lower potential and electron goes to higher potential? correct?

Yes