A Particle (Mass = 4

Multiple Choice

A particle (mass = 4.0 g, charge = 80 mC) moves in a region of space where the electric field is uniform and is given by E_x = −2.5 N/C, E_y = E_z = 0. If the velocity of the particle at t = 0 is given by v_x = 80 m/s, v_y = v_z = 0, what is the speed of the particle at t = 2.0 s?

A) 40 m/s
B) 20 m/s
C) 60 m/s
D) 80 m/s
E) 180 m/s