AQA · GCSE · Combined Science

    Course version: 8464 · Version from Sept 2018

    Speed: running ̴ 3 m/s

    Running is faster than walking, and a typical running speed is about 3 m/s.

    Checked against the AQA 8464 specification (opens in a new tab) on .

    • Point 6 of 18
    • 3 key terms

    Study notes

    From the checked teaching notes for this specification point.

    The idea

    Running is faster than walking, and a typical running speed is about 3 m/s. This means a runner covers roughly 3 metres each second. Using speed = distance ÷ time, you can calculate distance or time: for example, in 15 s a runner travels 3 m/s × 15 s = 45 m, and to run 60 m takes 60 m ÷ 3 m/s = 20 s. The symbol ̴ means approximately, so 3 m/s is an estimate for an average person jogging; sprinting speeds are higher and individual values vary. You should recognise this as a standard typical value, compare it with walking at about 1.5 m/s, and use it in calculations. When measuring running speed, time a measured distance and divide distance by time, keeping units consistent.

    What earns the marks

    • States that running speed is approximately 3 m/s, meaning about 3 metres travelled each second.
    • Uses the relationship speed = distance ÷ time, or its rearrangements, to calculate distance or time from a running speed of 3 m/s.
    • Applies the value in a calculation, for example distance = 3 m/s × 15 s = 45 m, or time = 60 m ÷ 3 m/s = 20 s.
    • Recognises that 3 m/s is an approximate value and that actual running speeds vary between people and conditions.
    • Compares running speed with walking speed, noting that running is about twice as fast as walking.

    Common mistakes and how to put them right

    • Writing the value as 3 m/s² or 3 m/s per second.

      Put it right by using m/s for speed.

    • Using 3 m/s as an exact speed for every runner.

      Put it right by treating it as a typical estimate and allowing for variation.

    • Forgetting to convert units, for example mixing seconds with minutes.

      Put it right by ensuring all units are consistent.

    Exam tips

    • When a question asks for a typical running speed, write 3 m/s with the correct unit; do not leave the answer as a bare number.
    • Show the equation you use, such as speed = distance ÷ time, then substitute values with units before calculating.
    • Check that your final answer is sensible: a running distance in 10 s should be about 30 m, not 3 m or 300 m.

    Try the lesson

    The start of the Speed: running ̴ 3 m/s lesson, made from checked teaching notes for this specification point.

    Have a go first

    What is a typical speed for a person running?

    Listen

    Running is faster than walking, and a typical running speed is about 3 m/s. This means a runner covers roughly 3 metres each second. Using speed = distance ÷ time, you can calculate distance or time: for example, in 15 s a runner travels 3 m/s × 15 s = 45 m, and to run 60 m takes 60 m ÷ 3 m/s = 20 s. The symbol ̴ means approximately, so 3 m/s is an estimate for an average person jogging; sprinting speeds are higher and individual values vary. You should recognise this as a standard typical value, compare it with walking at about 1.5 m/s, and use it in calculations. When measuring running speed, time a measured distance and divide distance by time, keeping units consistent. A strong answer earns marks for these points. States that running speed is approximately 3 m/s, meaning about 3 metres travelled each second. Uses the relationship speed = distance ÷ time, or its rearrangements, to calculate distance or time from a running speed of 3 m/s. Applies the value in a calculation, for example distance = 3 m/s × 15 s = 45 m, or time = 60 m ÷ 3 m/s = 20 s. Recognises that 3 m/s is an approximate value and that actual running speeds vary between people and conditions. A common slip: Writing the value as 3 m/s² or 3 m/s per second: speed is measured in m/s, not m/s², because acceleration is the quantity with m/s². Instead, using m/s for speed. Exam tip: When a question asks for a typical running speed, write 3 m/s with the correct unit; do not leave the answer as a bare number.

    See it

    A flowchart starting from a node labelled 'Running speed ~ 3 m/s'. This leads to a node 'Speed = distance ÷ time', which branches into 'Distance = speed × time' and 'Time = distance ÷ speed'. The distance branch leads to 'Example: 3 m/s × 15 s = 45 m' and the time branch leads to 'Example: 60 m ÷ 3 m/s = 20 s'. The starting node also leads to two further nodes: 'Approximate value: speeds vary' and 'Walking ~ 1.5 m/s: running about twice as fast'.
    It shows the running speed of about 3 m/s, the speed = distance ÷ time relationship with its rearrangements, worked examples, and the points that the value is approximate and about twice walking speed.

    Key words

    Say what each word means before you turn the card.

    Speed

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    Typical values for human motion

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    Approximation and estimation in physics

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    See every definition
    Speed
    Distance travelled per unit time, calculated using speed = distance ÷ time or its rearrangements.
    Typical values for human motion
    Standard values such as running at approximately 3 m/s, compared with walking at about 1.5 m/s.
    Approximation and estimation in physics
    The symbol ̴ means approximately, so 3 m/s is an estimate for an average person jogging, and individual values vary.

    Label the diagram

    Some boxes have lost their names. Pick the right name for each number.

    The diagram again, with 3 boxes numbered instead of named. A flowchart starting from a node labelled 'Running speed ~ 3 m/s'. This leads to a node 'Speed = distance ÷ time', which branches into 'Distance = speed × time' and 'Time = distance ÷ speed'. The distance branch leads to 'Example: 3 m/s × 15 s = 45 m' and the time branch leads to 'Example: 60 m ÷ 3 m/s = 20 s'. The starting node also leads to two further nodes: 'Approximate value: speeds vary' and 'Walking ~ 1.5 m/s: running about twice as fast'.
    • 1Box 1

    • 2Box 2

    • 3Box 3

    0 of 3 labelled

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