Distance-time graphs
2 marks · EasyA person walks 120 m in 80 seconds. Calculate the average speed of the person. State the correct unit.
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Show answer
1.5 m/s (±0.01)
Common mistakes: Incorrect division; Wrong units
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Writes or substitutes into speed = distance / time
A1 · 1 mark · Correct value 1.5 m/s with unit. (follow-through)
Worked solution
average speed = distance / time = 120 / 80 = 1.5 m/s