1. The Story of Sam and the Toy Car

2. Once upon a time, there was a girl called Sam. Just like her friends, Sam loved playing with toys.

3. One day, Sam’s Grandparents bought her a present. It was a bright red toy car.

4. Sam loved her new toy car. There was only one problem: Some of the children at school were always showing off to Sam about how great their toys were. Sam wanted to show them that her toy car was good too.

5. Sam had a think … I want my car to look really fast…

6. Sam had a think … I want my car to look like it can go a long way…

7. T I M E O U T Talk to your teacher: How can Sam make her car go fast? How can she make it travel a long way?

8. Sam’s best friend Mel came up with a brilliant idea … Why don’t you send the car down a ramp? That will make it go fast.

9. Sam’s friend Jin had another great plan… After sending the car down a ramp, let it travel across a smooth surface….

10. (He’s so clever..) If it moves along a bumpy surface, it will slow down quickly. This is because of : F R I C T I O N

11. T I M E O U T Your teacher will show you what FRICTION means…

12. Look at the photos on the next few slides. You need to decide which is the best surface for Sam to test her car on.

13. Which surface will the car go fastest along? This means it has hardly any friction. Which surface will the car go slowest along? This means that it has a lot of friction.

14. 1) The Classroom Carpet

15. 2) The Classroom Tiles

16. 3) The Doormat Outside the Doors

17. 4) The Walkway

18. 6) The Playground Tiles

19. 7) The Sand Pit

20. 8) The Grass

21. You are now going to test your predictions … Have a look at the worksheet that follows…