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Question 2:
What can you say about the motion of an object whose distance−time graph is a straight line parallel to the time axis?
When an object is at rest, its distance−time graph is a straight line parallel to the time axis.
A straight line parallel to the x-axis in a distance−-time graph indicates that with a change in time, there is no change in the position of the object. Thus, the object is at rest.
