1. Speed

2. Starter : On your whiteboards write down what you understand by the term speed? ConceptConcept UnitsUnits ExamplesExamples

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4. Learning Objective : To understand the concepts of distance, time and speed and their relationships Why? Because you need to understand speed to plan journeys, to avoid speeding fines, and to make sense of Jeremy Clarkson on Top Gear!

5. Success Criteria : Understand the concepts of distance, time and speed Understand the relationship between them To be able to solve speed related problems

6. What do we mean by distance? a numerical description of how far apart objects are A B Start Finish

7. What are the units for distance? Metres (m) Kilometres (km) Kilo means “1000” Miles Take great care with mixed units in questions correct units for Physics

8. What are the units for time? seconds (s) hours (h) Take great care with mixed units in questions correct units for Physics

9. What do we mean by the term speed? For example when we say : 30 miles per hour Distance travelled per unit time

10. We can show this as an equation : Average speed = What will the units be? Total time taken Total distance travelled An example…. metres / second (m/s) kilometres / hour (km/h) Take great care depends upon the question

11. Two Exercises (Whiteboards): 1. A car travels 600 metres in 30 seconds what is the average speed in metres per second? 2. A man runs 1km in 100 seconds what is his average speed in m/s?

12. Revisit the equation : Average speed = Total time taken Total distance travelled Average speed = Total time taken Total distance travelled

13. Rearranging the equation 1: Average speed x Total time taken Total distance travelled = If we travel at 10m/s for 20s how far have we travelled in total?

14. Rearranging the equation 2: How long will it take to travel 120m at 60m/s? Average speed Total time taken = Total distance travelled

15. Exercises:

16. True or False?: On your whiteboard If a car normally takes 20 mins to complete a journey, it would take 40mins to complete the journey at half the speed If the winner takes 10s for a 100m and the slowest runner takes 20s. The slowest runner will be at the 65m mark when the race is won If a car is driving at 60 km/h it will take 327 minutes to complete a 327 kilometer journey

17. Learning Objective : To understand the concepts of distance, time and speed and their relationships Success Criteria : Understand the concepts of distance, time and speed Understand the relationship between them To be able to solve speed related problems

18. Revision: 9B2 Revision for test (next week) In your revision guide: Forces Module : 1.Speedpages 86-87 2.Measuring forces on objectspages 90-91 3.Frictionpages 92-93 4.Momentspages 94-95 5.Pressurepages 96-97 Hand in your exercise books so that the forces practical can be marked.