The solution of the problem 2.16 кр 2 from the problem

The solution of the problem 2.16 кр 2 from the problem

Task 2.16
The charge of 1 nC was attracted to an infinite plane, uniformly charged with the surface density
0.2 μC / m2. At what distance from the plane was the charge, if the work of the field forces along its
The movement is 1 μJ?