Question

Find surface charge density. Picture in comment.

Answer 1

I have the solution, but I need a better explanation.

Answer 2

This is a tough one

Answer 3

to start the field is constant irrespective of distance, you can gte that quickly from a gaussian surface

so \(E = \dfrac{\sigma}{2 \epsilon_0}\) where \(\sigma\) is densiyt

as it's a constant field, you can then use Newtons EoM's for constant acceleration here \(v^2 - u^2 = 2 a s \) would be good to get the decelleration

and Newton's 2nd law \(F = ma = Eq\)

i haven't done it but that is how i would do it

maybe that helps?