Calculate the proton's initial kinetic energy express your answer with the appropriate units. constants an infinitely long line of charge has linear charge density 4.00x10-12 c/m aproton (mass 1.67x 10 2 kg, charge +1.60x 10 toward the line at 2.90x103 m/s k 7.02x10-21 j c) is 18.0 cm from the line and moving directly submit previous answers correct part b how close does the proton get to the line of charge? express your answer with the appropriate units. ? d= 0.1199 m