Qyuestion: An infinitely long line of charge has linear charge density 6.00Ã-10âˆ'12 C/m . A proton (mass 1.67Ã-10âˆ'27 kg, charge +1.60Ã-10âˆ'19 C) is 18.0 cm from the line and moving directly toward the line at 3.20Ã-103 m/s .
A) Calculate the proton's initial kinetic energy.
B) How close does the proton get to the line of charge?