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The following figure shows velocity –time graph for the journey of a car in 100minutes.
velocity time graph of a car figure

  1. Determine the acceleration of the car between A and B and between C and D 
  2. Determine the distance covered by the car during the journey 
  3. Determine the average velocity of the car 

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  1. a = slope of graph
       = 30m s −1   
         30 x 60s
       = 0.016m s−2  
    between C and D
    a=−30m s −1  
        10 x 60s
    = 0.05m s−2
  2. Distance = area under graph
                 =30ms−1 x ( 100 + 60) x 60s
                                          2
                 = 144 000m.
  3. Vav = total distance
                total time
          = 144 000m   
             100 x 60s
          = 24ms−1  
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