P3 - A

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  • Created by: zoolouise
  • Created on: 02-06-15 18:52
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  • Speed
    • Measuring speed
      • Speed = distance/time
      • We write 'average' speed as the speed changes throughout a car journey.
      • The speed of a car at a certain point is called instantaneous speed
      • Distance traveled = average speed x time
      • Increasing the speed means increasing the distance traveled in the same time. increasing the speed reduces the time needed to cover the same distance.
    • Distance-time graphs
      • Distance-time graphs allow a collection of data to be shown. It's easier to interpret data when they are plotted on a graph than when they're listed in a table
      • The gradient of a distance-time graph tells you about the speed of the object. A higher speed means a stepper gradient.
      • Speed is equal to the gradient of a distance-time graph
        • Gradient = y/x
      • A straight line shows that the speed is constant.
        • A curved line shows that the speed is changing.


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