Posted by Elisa on Wednesday, June 4, 2008 at 6:48pm.
No, #1 and #3 would be different trajectories. Note that they are asking about position vs. time, not about the shape of the trajectory
So in which one would the graph of position vs time be a parabola?
If the object moves along a straight line, then wouldn't the position graph just be an increasing line with with positive slope?
If position vs time is a parabolca, the object is accelerating at a constant rate along a straight line.
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