A proton (mass = 1.67 1027 kg, charge = 1.60 1019 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 50 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB VA.
a. +20 V
b. 20 V
c. 27 V
d. +27 V
e. 40 V
Question 2
A particle (mass = 6.7 1027 kg, charge = 3.2 1019 C) moves along the positive x axis with a speed of 4.8 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
a. 2.0 kN/C
b. 1.5 kN/C
c. 1.2 kN/C
d. 3.5 kN/C
e. 2.4 kN/C
