Position - Time Diagrams

  1. 10 s
  2. 11 m
  3. 11 m

  4. Beginning time - Ending time Time interval Distance traveled in this interval Speed
    0 to 2 secs  2s  2m  1 m/s
    2 to 3 secs  1s  0m  0 m/s
    3 to 4 secs  1s  2m  2 m/s
    4 to 5 secs  1s  1m  1 m/s
    5 to 8 secs  3s  6m  2 m/s
    8 to 10 secs  2s  0m  0 m/s
    0 to 10 secs  10s  11m  1.1 m/s
  5. 6/6 = 1.0 m/s
  6. The value from represents the average speed over the 10 second interval.
  7. The last number is the average value over 10 seconds, not the average of each time interval, which is the answer in question #5.

Diagram #2

  1. 10s
  2. 3m
  3. 8 + 5 = 13m

  4. Beginning time - Ending time Time interval Distance traveled in this interval Speed
    0 to 2 secs  2s  4m  2 m/s
    2 to 4 secs  2s  4m  2 m/s
    0 to 4 secs  4s  8s  2 m/s
    4 to 9 secs  5s  -5m  -1 m/s
  5. On the board.
  6. First line: Positive because the motion is in the forward or positive direction
    Second line: Negative because the motion is back towards the starting position. Object moves opposite to the first motion.
  7. 0.0 m/s
    0.0 m/s     There is no rise. The object didn't go anywhere.
  8. Distance traveled is 3m. Time is 10s. Therefore average speed is 3/10 or 0.3 m/s.
  9. Object travels forward at a speed of 8/4 = 2.0 m/s.
  10. Object travels backwards at a speed of 5/5 = 1.0 m/s or
    we could say the objects speed is -1.0 m/s (the minus sign says that the object is travelling back to its starting position).
  11. 5.0 m as read directly of the graph.