An electron is to be accelerated from a velocity of

Question

Part A: An electron is to be accelerated from a velocity of 2.00x106m/s to a velocity of 9.00 x 10⁶m/s Through what potential difference must the electron pass to accomplish this?

Part B: Through what potential difference must the electron pass if it is to be slowed from 9.00 x 10⁶ mis to a halt?