A proton is released at rest,
2.0cm
distance from an infinitely long, uniformly charged straight line. It is observed that at the instant of release, the proton experiences an electric force of
1.44*10^(-18)N
directed away from the line. a) Calculate the charge density of the line. (10 points) b) Use conservation of energy to calculate the speed of the proton when it reaches
6.0cm
away from the line. ( 10 points)