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9L PRESSURE AND MOMENTS

9L PRESSURE AND MOMENTS. Pressure. What is the equation for calculating pressure? Name 2 ways that pressure can be increased . What are the units of pressure?. One of the sharpest knives in the world. http://youtu.be/8PQiaurIiDM. Calculating pressure.

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9L PRESSURE AND MOMENTS

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  1. 9L PRESSURE AND MOMENTS

  2. Pressure • What is the equation for calculating pressure? • Name 2 waysthatpressure can beincreased. • What are the units of pressure?

  3. One of thesharpestknives in theworld http://youtu.be/8PQiaurIiDM

  4. Calculatingpressure Pressure (N/cm2) = Force (N) Area (cm2)

  5. Aim: Toinvestigatehowthepressure I exertonthegroundchanges.

  6. Calculatingpressure Pressure (N/cm2) = Force (N) b Area (cm2) e.g.Pressure = force÷ area = 700 ÷ 20 = 35 N/cm2 ALWAYS Formula Addnumbers Answer Units

  7. Waterpressure • What is water pressure? • Whichdirectiondoesitact in? • How does it change with depth?

  8. Scubadivingexperiments • http://youtu.be/PavY_JmYyTs • http://youtu.be/HlZXDcSR-Z4 • http://youtu.be/t8wFIMbMJvs Polystyrene cup http://www.sciencedump.com/content/what-happens-coffee-cup-2300-meters-depth-ocean Mythbusters http://youtu.be/YU2PSHeFSlA

  9. Air pressure • What is air pressure? • How does it change with altitude? • How can youincrease air pressure?

  10. Demos http://www.youtube.com/watch?v=_xB7q6bJ8k8 http://www.youtube.com/watch?v=QeAp3CuGjk8

  11. MOMENTS • Whatis a moment? • Complete this formula: Moment ( ) = • Whatunitis a momentmeasured in?

  12. WHY DID THIS HAPPEN?

  13. Balancing

  14. Convertingmasstoweight Mass (kg) = mass (g) ÷ 1000 Weight (N) = mass (kg) ÷ 10

  15. Calculatingthemoment Moment (Nm) = Force (N) x distance (m) ALWAYS Formula Addnumbers Answer Units

  16. levers • Whatis a lever? • Name 5 examples of wherewe use levers.

  17. Lets look at a bike and sometools

  18. plenary Findthelever and fulcrum

  19. Capsizing http://youtu.be/S-FlN97Y3ok Worldspeedsailing record http://youtu.be/qzkulFGa4Mc Mothboat http://youtu.be/1SN1gSkqvy0 L´Hydroptere http://youtu.be/MdUyLxVa6xQ Sailrocket2 2012 record (125km/h) http://youtu.be/pipGWQmerEQ Windsurf speed record http://youtu.be/t15LZ1Er-a8

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