A Particle (Mass = 4

question 10

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 Ex = −2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vx = 80 m/s, vy = vz = 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

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