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 × 10^5 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
c
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