distance-time graphs

• What can you determine from a distance time graph?

  An object's speed
• What should you be able to construct from given information by the end of the video?

  A distance time graph
• What should higher tier students be able to use to determine the speed of an accelerating object?

  A tangent
• What key fact is mentioned about an object moving along a straight line?

  The distance traveled can be represented by a distance time graph
• Describe the journey of the person in the example provided.

  • Walked 100 m in 100 seconds
  • Stopped for 40 seconds
  • Walked another 70 m in 50 seconds
• What point do you place on the graph after the first part of the journey?

  A dot at 100 m and 100 seconds
• How do you represent the starting point of the journey on a distance time graph?

  Place a point at 0 seconds and 0 m
• How do you represent the stop in the journey on the distance time graph?

  Place a dot 40 seconds further along the time axis at 100 m
• How do you represent the last part of the journey on the distance time graph?

  Place a dot 70 m further up the distance axis and 50 seconds further along the time axis
• What does the gradient of a distance time graph tell us?

  The object's speed
• How do you calculate the speed from the gradient of a distance time graph?

  Divide the distance traveled by the time taken
• What is the speed calculated for the first part of the journey if the distance traveled is 120 m and the time taken is 60 seconds?

  2 m per second
• What is the speed calculated for the second part of the journey if the distance traveled is 40 m and the time taken is 130 seconds?

  0.3 m/s to 1 decimal place
• What does an upward sloping curve on a distance time graph indicate?

  The object is constantly increasing in speed
• How do you determine the speed of an object at a specific point on an accelerating distance time graph?

  Draw a tangent to the line at that point
• What is the distance traveled and time taken at 100 seconds if the tangent shows 140 m and 80 seconds?

  Speed is 1.75 m/s
• Where can students find more questions on distance time graphs?

  • In the vision workbook
  • By clicking on the provided link