A negatively charged particle of mass m: 1.1? x 1024 kg a nd q = 1.6017 1049 C is immersed in a uniform 6.00x103 N/C electric field pointing in the negative x direction, as shown in the Figure. The particle is initially traveling antiparallel to the uniform electric field at a speed of 2.00 35103 m/s {at the instant when the particle is passing through equipotential surface labeled \"'A") . Assume that the gravitational force acting on the particle is negligible compared to the electrostatic force acting on it. In the following, consider the period of time during which the particle travels a distance of 10.0 mm anti-parallel to the uniform electric field, between the equipotential surfaces labeled "A\" and "B\" in the Figure. W _\\ I I E ' | I ' a. I E 4&9 . E 21. The work done on the charged particle by the electric field equals a. -60.0J. b. 9.60>