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Transport Homework #1

Speed - Instantaneous and Average

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    Calculate the speeds in questions 1 and 2

  1. A train of length 20m passes an observer in 0.5s. Calculate the speed of the train and state whether this is an instantaneous or average speed?
    speed =
  2. The same train takes 3.4hr to travel 267km. Calculate the speed of the train and state whether this is an instantaneous or average speed?
    d = 267km = m
    t = 3.4hr = s
    speed = ,

    3. Calculate the unknown quantity in questions 3 to 8.

  3. t = 5s, d = 10m, s =
  4. d = 100km, s = 10km h-1, t = hr
  5. d = 100cm, s = 10cm h-1, t = hr
  6. d = 1000m, s = 333mm s-1, t = s
  7. t = 5min, s = 2m s-1, d =
  8. t = 10min, s = 50km h-1, d =

    9. Convert the speeds in questions 9 to 12 (show working)

  9. 1 km h-1 to ms-1

    Answer: ms-1

  10. 1 mph-1 to ms-1

    Answer: ms-1

  11. 1 m s-1 to mph (8km = 5miles)

    Answer: mph

  12. 1 cm s-1 to feet hour-1 (1 foot = 304.8 mm exactly)

    Answer: feet hour-1

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