An electron moving along the x axis has an initial speed of 1 × 106 m/s at the origin. Its speed is reduced to 5 × 105 m/s at th
e point xP , 3 cm away from the origin. Calculate the magnitude of the potential difference between this point and the origin. The mass of the electron is 9.109 × 10−31 kg and the elemental charge is 1.602 × 10−19 C. Answer in units of V.
By conservation of energy principle, we know that the potential difference between two points is equal to the change in the kinetic energy between these points.