Problem: A charge of -2.2 µC is fixed in place. From a horizontal distance of 0.0725 m, a particle of mass 3.50 x 10-3 kg and charge -2.3 µC is fired with an initial speed of 27.5 m/s directly toward the fixed charge.
Part A: How far does the particle travel before its speed is zero?
Please explain clearly with details so that I can follow.