A Particle (Q = 3

question 25

Multiple Choice

A particle (q = 3.0 mC, m = 20 g) has a speed of 20 m/s when it enters a region where the electric field has a constant magnitude of 80 N/C and a direction which is the same as the velocity of the particle. What is the speed of the particle 3.0 s after it enters this region?

• A) 68 m/s
• B) 44 m/s
• C) 56 m/s
• D) 80 m/s
• E) 36 m/s

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