A Particle (Mass = 6

A particle (mass = 6.7*10 ^{- 27} kg,charge = 3.2 *10 ^{- 19} C) moves along the positive x axis with a speed of 4.8 *10⁵ m/s.It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field.What is the magnitude of the electric field?

A) 2.0 kN/C
B) 1.5 kN/C
C) 1.2 kN/C
D) 3.5 kN/C
E) 2.4 kN/C