The position vs. time graph of a moving object is shown
to the right. Use this graph to answer questions 26
through 30.
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Explanation:
26. average speed = total distance/total time = 8/4 = 2 m/s
27. average speed = 2/4 = 0.5 m/s
28. position (at t = 6 seconds) = 9 m
29. average acceleration = change in speed/time taken
speed at any instant in an x-t graph is the slope of the graph. Between 4s and 8s, slope of graph is same. thus, speed remains constant. thus, acceleration = 0 m/s²
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