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Lesson: Pressure

Explore the concept of pressure, its measurement, and its significance in different scenarios. Investigate the relationship between pressure and depth in a liquid. Learn about the Teton Dam failure and the importance of pressure in a space station.

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Lesson: Pressure

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  1. Lesson: Pressure

  2. Which side would you prefer to press with your finger? Pointed side? Why? Flat side?

  3. Which puts more pressure on the ground? Why? OR

  4. PRESSURE is a measure of the amount of force being put on a certain area. Pressure = ------------- Force Area Pressure is measured in Pacals (Pa).

  5. REMEMBER Mass is the amount of matter in an object. It is measured in Kilograms (Kg). It is not a force. MASS = 120 Kg WEIGHT = 1200 N Weight is the force of gravity acting on the mass of an object. Weight is measured in Newtons.

  6. If a block weighs 1200 N and the area under the block is 12m2, calculate the pressure it puts on the ground. Pressure = ------------- FORCE AREA Pressure = ------------- 1200 N 12 m2 Pressure = 100 Pa

  7. Some important examples of pressure! Where else is pressure important?

  8. Teton Dam (USA) Failure in 1976 Why is it important to understand pressure?

  9. Carry out an investigation to show the relationship between pressure and depth in a liquid. METHOD cap • Set up the apparatus as shown. • Remove the pins. • Remove the cap. • Measure how far the water spurts out from each hole. • Record results in a table. pins Ruler Plastic bottle

  10. Review Questions Force 1. Pressure = ------------- ? 2. What unit is Pressure measured in? 3. How does pressure vary with depth in a liquid?

  11. Question to think about! Why is pressure important in a space station?

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