1. 9L PRESSURE AND MOMENTS

2. P RESSURE  What is the equation for calculating pressure?  Name 2 ways that pressure can be increased.  What are the units of pressure?

4. O NE OF THE SHARPEST KNIVES IN THE WORLD http://youtu.be/8PQiaurIiDM

5. C ALCULATING PRESSURE Pressure (N/cm 2 ) =Force (N) Area (cm 2 )

6. A IM : T O INVESTIGATE HOW THE PRESSURE I EXERT ON THE GROUND CHANGES. Body part/shoe Area (cm 2 )Force (N)Pressure (N/cm 2 ) 1 foot 2 feet 1 hand 2 hands

7. C ALCULATING PRESSURE Pressure (N/cm 2 ) = Force (N) b Area (cm 2 ) e.g. Pressure= force ÷ area = 700 ÷ 20 = 35 N/cm 2 ALWAYS 1.Formula 2.Add numbers 3.Answer 4.Units

10. W ATER PRESSURE  What is water pressure?  Which direction does it act in?  How does it change with depth?

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12. A IR PRESSURE  What is air pressure?  How does it change with altitude?  How can you increase air pressure?

13. D EMOS http://www.youtube.com/watch?v=_xB7q6bJ8k8 http://www.youtube.com/watch?v=QeAp3CuGjk8

15. MOMENTS  What is a moment?  Complete this formula: Moment ( ) =  What unit is a moment measured in?

26. WHY DID THIS HAPPEN?

27. B ALANCING LeftRight Distance from fulcrum (m) Mass (g)Weight (N) Moment (Nm) Distance from fulcrum (m) Mass (g)Weight (N) Moment (Nm)

28. C ONVERTING MASS TO WEIGHT Mass (kg) = mass (g) ÷ 1000 Weight (N) = mass (kg) ÷ 10

29. C ALCULATING THE MOMENT Moment (Nm) = Force (N) x distance (m) ALWAYS 1.Formula 2.Add numbers 3.Answer 4.Units

30. LEVERS  What is a lever?  Name 5 examples of where we use levers.

31. L ETS LOOK AT A BIKE AND SOME TOOLS

32. PLENARY Find the lever and fulcrum

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