Which of the following distance - time graph is not possbile ? Explain why?

Explanation

In graph - I the distance travelled be the body is not changing with time. Thus, the body is at rest. In graph - II distance travelled by the body decreases with time . It is not possible. In graph- III the body has different distnaces at the same time. the graph is alos not possbile . in graph -IV the distance increases with time. therefore, the body is moving with a uniform speed. thus, the graphs, 2 and 3 are not possible.