Distance-time Graphs

• What should you be able to construct from given information by the end of the video?

  A distance time graph
• What can you determine from a distance time graph?

  An object's speed
• What should higher tier students be able to use to determine the speed of an accelerating object?

  A tangent
• What does a distance time graph represent when an object moves along a straight line?

  The distance traveled over time
• What is the journey description of the person in the video?

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

  100 m at 100 seconds
• How is the stop period represented on the distance time graph?

  By placing a dot 40 seconds further along
• How do you represent the last part of the journey on the graph?

  Place a dot 70 m higher and 50 seconds later
• What does the gradient of a distance time graph indicate?

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

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

  2 m per second
• What is the speed for the second part of the journey if the distance is 40 m and time 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 accelerating
• How do you determine the speed of an accelerating object at a specific time?

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

  1.75 m/s
• Where can you find more questions on distance time graphs?

  • In the vision workbook
  • Click on the link provided in the video