The Velocity of a Particle Moving Along the X Axis

question 45

Multiple Choice

The velocity of a particle moving along the x axis changes from v_i to v_f.For which values of v_i and v_f is the total work done on the particle positive?

• A)v_i = 5m/s, v_f = 2m/s
• B)v_i = 5m/s, v_f = -2m/s
• C)v_i = -5m/s, v_f = -2m/s
• D)v_i = -5m/s, v_f = 2m/s
• E)v_i = -2m/s, v_f = -5m/s

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