The graph to the right shows the speed of a truck as it moves along a straight, level road. Which of the following describe a method to determine the distance d the truck travels during the 10 s time interval shown? Select two answers.  a Multiply the average speed of 18 m/s by the 10 s travel time.  b Calculate the area under the line in the graph.  c Multiply half the initial speed of 30 m/s by the 10 s travel time.  d Calculate the slope of the line in the graph to determine the acceleration a and then use d = (1 2) 2 at , where t is the travel time.

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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –