A) An electron is moving east in a uniform electric field of 1.48 N/C directed to the west. At point A, the velocity of the electron is
4.55
×
10
5
m/s pointed towards the east.

What is the speed of the electron when it reaches point B which is a distance of 0.370 m east of point A?

B) A proton is moving in the uniform electric field of part (A), at which point A, the velocity of the proton is
1.91
×
10
4
m/s, again points towards the east.

What is the speed of the proton at point B?