Distance-Time Graph

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

  Construct a distance time graph from given information.
• What can you determine from a distance time graph?

  You can determine an object's speed from a distance time graph.
• What is the difference between speed and velocity?

  Speed is different from velocity as speed is scalar and velocity is vector.
• What does the point at 0 seconds and 0 m represent on a distance time graph?

  The person before they started walking.
• How do you represent a stop in a journey on a distance time graph?

  By placing a dot at the same distance with an increase in time.
• How do you plot a distance time graph for a journey?

  1. Place a dot at the starting point (0 m, 0 seconds).
  2. Plot points for each segment of the journey based on distance and time.
  3. Connect the dots with straight lines.
• What does the gradient of a distance time graph indicate?

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

  By dividing the distance traveled by the time taken.
• What is the formula to calculate speed?

  Speed = distance traveled / time taken.
• What does an upward sloping curve on a distance time graph indicate?

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

  By drawing a tangent to the line at that point and calculating its gradient.
• What is the significance of drawing a tangent on a distance time graph?

  It helps determine the speed of the object at that specific point.
• How do you calculate the speed from the tangent on a distance time graph?

  By dividing the distance traveled by the time taken along the tangent.