A proton is released from rest in a uniform electric field of magnitude 1.5 105 V/m directed along the positive x axis. The proton undergoes a displacement of 0.3 m in the direction of the electric field as shown in the figure. Find the change in the electric potential if the proton moves from the point A to B. The mass of a proton is 1.672623 10?27 kg. Answer in units of V.

1.5 x 10" V/m I + + + + + ++++ ++++ 0.3 m