Year 10 Lesson on speed
Transcript of Year 10 Lesson on speed
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Speed
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Your mission is:
• Pair up – or jump in a 3, or do this individually – your choice (try your best to pair up)
• You will have a timer between you to share.
• 1. One person will time, the other will walk/run 100m
• When finished, record the time you took to run/walk.
• 2. Swap – the timer will now run 100m, the runner will now time.
• Make sure to record the time it took you to run/walk 100m!
• We will come back up here and calculate our speed!
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Speed can be measured in:
•Kilometres per hour (km/h)
•Metres per second (m/s)
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The formula triangle!!
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To find distance, we
remove it from the
triangle
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To find time, we
remove it from the
triangle
![Page 7: Year 10 Lesson on speed](https://reader036.fdocuments.us/reader036/viewer/2022081821/55a4a68d1a28abf0728b45ce/html5/thumbnails/7.jpg)
To find speed, we
remove it from the
triangle
![Page 8: Year 10 Lesson on speed](https://reader036.fdocuments.us/reader036/viewer/2022081821/55a4a68d1a28abf0728b45ce/html5/thumbnails/8.jpg)
Question
•Daisha drove her car 70km at an average speed of 35km/h – How long was the journey?
Distance = 70km
Speed = 35 km/h
• Time = distance ÷ speed
• Time = 70 ÷ 35
• Time = 2
• We have used the unit “kilometres per hour” so our answer is 2 hours
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Question
• John missed the bus to had to walk home from school. It took him 2 hours. His average speed was 6km/h – how far away from school does John live?
Speed = 6km/h
Time= 2 hours
• Distance = speed x time
• Distance = 6km/h x 2 hours
• Distance = 6 x 2
• = 12 kilometres
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Question
•Kritesh ran 100m in 9.58 seconds, what was his average speed?
Distance = 100m
Time= 9.58 seconds
• Speed = distance ÷ time
• Speed = 100 ÷ 9.58
• Speed = 10.43
• So Kritesh was travelling at 10.43 meters per second (m/s)