Question

What does a vertical line on a position-time graph indicate about the object?

Answer 1

A vertical line on a position-time graph indicates that the object is not moving; it is at the same position over time. This means that for that particular time interval, the object's position does not change. Since a vertical line represents a situation where there is an infinite speed (as the position changes without any time passing), this scenario is not physically possible under normal circumstances. Thus, a vertical line implies that the object is instantaneously stationary, and in practical terms, it suggests that the graph might be improperly drawn or represents an unrealistic situation.