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9Ka/3 Measuring speed Name Class How fast do you walk? 9 K a distance Complete these sentences using the words in the box. You may need to use some words more than once. Speed is a way of saying how measure something is moving. To work out a speed we need to and a metres a . The formula is = distance ÷ metres/second speed . If the units for the distance are the fast time , and the units for are seconds, the units for speed will be . P Apparatus ● ● Long tape measure Chalk ● ● Stopclock Calculator Method 1 Use the tape measure and chalk to mark out a distance of 10 metres. 2 Use the stop clock to find out how long it takes to walk 10 metres at your normal walking speed. Write your time in the table. 3 Now find out how long it takes if you walk 10 metres at your fastest speed. Write your time in the table. Recording your results Now calculate your walking speeds. You need to use this formula: speed = distance time Walking Distance (m) Time (s) Speed (m/s) normal fast S observing, knowledge Exploring Science for QCA Copymaster File 9 548 © Pearson Education Limited 2002