1. 3.3 pressure Pressure depends on force and area. Force Pressure = Area
pascal
A measure of how much force is acting on a certain area; how concentrated a force is.
Pressure depends on surface area.
Pressure =
Force
Area
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2. 3.3 Pascal (Pa) Pressure depends on force and area.
The unit used to measure pressure; one pascal is the pressure exerted by one newton of force on an area of one square meter, or one N/m2.
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3. Pressure depends on force and area.
3.3
Pressure depends on force and area.
Pressure in a fluid acts in all directions.
pressure
pascal
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4. Pressure depends on force and area.
3.3
Pressure depends on force and area.
Pressure =
Force
Area
pressure
Pressure in a fluid acts in all directions.
pascal
VISUALIZATION
See how to lift a stool using a rubber mat and air pressure.
SIMULATION
Explore how a fluid produces pressure.
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5. Fluids can exert a force on objects.
3.4
Fluids can exert a force on objects.
• Buoyant force is equal to the weight of the displaced fluid.
buoyant force
Bernoulli's principle
Pascal’s principle
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6. 3.4 buoyant force Fluids can exert a force on objects.
Bernoulli's principle
The upward force on objects in a fluid; often called buoyancy.
Pascal’s principle
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7. Try to crush the egg applying equal pressure.
Air pressure
Mark intervals of 1cm along the length of one straw
Fill cup half way with colored water
Hold the marked straw in the water (do not touch the bottom of the cup
Blow across the top of the straw with different speeds and observe.
Try to crush the egg applying equal pressure.

8. 3.4 Bernoulli's principle Fluids can exert a force on objects.
buoyant force
Bernoulli's principle
Bernoulli's principle
An increase in the speed of a fluid decreases the pressure within the fluid.
Pascal’s principle
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9. 3.4 Pascal’s principle Fluids can exert a force on objects.
A statement that says when an outside pressure is applied at any point to a fluid in a container, that pressure is transmitted throughout the fluid with equal strength.