• Describe what determins the pressure in a liquid
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This lesson contains 12 slides, with text slides and 2 videos.
Items in this lesson
Learning objectives
8.3 Pressure in liquids
• Explain what is meant by liquid pressure
• Describe what determins the pressure in a liquid
Slide 1 - Slide
Liquid pressure
Liquids and gases consist of many small particles in constant random motion. These particles exert forces on any surfaces that they happen to collide with.
Slide 2 - Slide
Why the concrete at the bottom of dam is thicker?
Slide 3 - Slide
Slide 4 - Slide
Slide 5 - Slide
Upthrust and liquid pressure
The upthrust acts in the opposite direction to the weight and is caused by the pressure of the liquid acting over the area of the object in the liquid.
Slide 6 - Slide
Characteristic of liquid pressure
1. Increases with depth.
2. Acts in all directions.
3. The pressure at the two points at the same level is the same.
Slide 7 - Slide
Slide 8 - Slide
The bends
If a diver goes deeper and deeper into the water, more nitrogen builds up in the bloodstream and other tissues.
when the diver ascends quickly to the surface, this Nitrogen forms bubbles, as the pressure is reduced, in the bloodstream.
