An electron moving parallel to the x axis has an initial speed of 3.70*10^6m/s at the origin. Its speed is reduced to 1.40*10^5m/s at the point x=2cm.
A. Calculate the electric potential difference between the origin and that point.
B. Which point has higher potential energy?
C. Which point does the electron have a higher potential energy?
D. If instead a proton had been traveling at the origin with the same velocity as the electron, how fast would it be moving when it reaches the point x=2cm.
E. Which point has a higher potential?
F. Which point does the proton have a higher potential energy?