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Chapter 11, Sections 1 & 2 Pressure!!. What is Pressure??? Pressure is related to the word Press. Pressure=Force/Area A Barometer is used to measure Pressure.

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Presentation on theme: "Chapter 11, Sections 1 & 2 Pressure!!. What is Pressure??? Pressure is related to the word Press. Pressure=Force/Area A Barometer is used to measure Pressure."— Presentation transcript:

1 Chapter 11, Sections 1 & 2 Pressure!!

2 What is Pressure??? Pressure is related to the word Press. Pressure=Force/Area A Barometer is used to measure Pressure. Your feet exert pressure on the ground. –The amount of Pressure you exert depends on the area over which you exert a Force. –Pressure is measured in Pascals.

3 Fluid Pressure In a fluid, all of the forces exerted by the individual particles combine to make up the pressure exerted by the fluid. Figure 4, pg. 419

4 Air Pressure Did you know air is considered a fluid? Air exerts Pressure because of its mass. You are holding up air when you hold out your hand. Balanced Pressure is the same as a balanced force, the downward pressure is equal and opposite the upward pressure. Look at figure 5, pg. 421

5 Density Remember, Density is an object’s mass per unit volume. Density=mass/volume By comparing Densities, you can predict whether an object will float or sink in a fluid. Changing Density can explain why an object floats or sinks. Figure 7, pg. 425

6 Buoyancy The ability to float. The Buoyant force acts in the direction opposite to the force of gravity, so it makes an object feel lighter. Figures 8-12, pg.’s


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