Question

A graph labeled velocity versus time with horizontal axis time (seconds) and vertical axis velocity (meters per second). A blue line runs straight across at 2 units on the vertical axis for all horizontal axis values.
Based on the graph of velocity over time, which could be the initial velocity and the final velocity for this graph?

initial = 0 m/s; final = 2.5 m/s
initial = 2.5 m/s; final = 2.5 m/s
initial = 3.0 m/s; final = 6.0 m/s
initial = 6.0 m/s; final = 3.0 m/s

Answer 1

Because the velocity is constant (horizontal line), the initial and final velocities must be the same. The only choice with equal initial and final values is:

initial = 2.5 m/s; final = 2.5 m/s

(If an exact match to the graph were required, both would be 2.0 m/s.)