A proton is released from rest at x 5 22.00 cm in a constant electric field with magnitude 1.50 3 103 N/C, pointing in the positive x-direction. (a) Calculate the change in the electric potential energy associated with the proton when it reaches x 5 5.00 cm. (b) An electron is now fired in the same direction from the same position. What is the change
in electric potential energy associated with the electron if it reaches x 5 12.0 cm? (c) If the direction of the electric field is
reversed and an electron is released from rest at x 5 3.00 cm, by how much has the electric potential energy changed when
the electron reaches x 5 7.00 cm?