1. Do Now! Can you put the syllabus and Definition list in your folders for our new topic Topic 2: Mechanics

2. A reminder

3. Average speed = distance travelled time taken S t d x

4. Let’s Measure some speeds Evening all!

5. Distance against time graphs distance time

6. No movement? distance time

7. No movement distance time

8. Constant speed? distance time

9. Constant speed distance time

10. Constant speed distance time The gradient of this graph gives the speed

11. Constant speed distance time How would the graph look different for a faster constant speed?

12. Constant speed distance time fast

13. Constant speed distance time fast How would the graph look different for a slower constant speed?

14. Constant speed distance time fast slow

15. Getting faster? (accelerating) distance time

16. Getting faster (accelerating) distance time

17. Examples distance time

18. A car accelerating from stop and then hitting a wall distance time

19. A car accelerating from stop and then hitting a wall distance time

20. Speed against time graphs speed time

21. No movement? speed time

22. No movement speed time

23. Constant speed? speed time

24. Constant speed speed time

25. Constant speed speed time How would the graph look different for a faster constant speed?

26. Constant speed speed time fast

27. Constant speed speed time fast How would the graph look different for a slower constant speed?

28. Constant speed speed time fast slow

29. Getting faster? (accelerating) speed time

30. Getting faster? (accelerating) speed time Constant acceleration

31. Getting faster? (accelerating) speed time The gradient of this graph gives the acceleration

32. Getting faster? (accelerating) speed time a = v – u t (v= final speed, u = initial speed) v u The gradient of this graph gives the acceleration

33. Getting faster? (accelerating) speed time The area under the graph gives the distance travelled

34. Example: speed time

35. A dog falling from a tall building (no air resistance) speed time

36. A dog falling from a tall building (no air resistance) speed time

37. A dog falling from a tall building (no air resistance) speed time Area = height of building

38. Be careful! distance time speed time

39. No movement distance time speed time

40. Constant speed distance time speed time Area = distance travelled

41. Constant acceleration distance time speed time Area = distance travelled Gradient = acceleration a = (v-u)/t

42. Now let’s try some questions! Jack Yes!