Physics › Section H · Fluids › Topic H.6
Bernoulli's equation and its uses
When a fluid speeds up, something must push it, so its pressure has to change. Bernoulli's equation is conservation of energy written for a flowing fluid, and it links pressure, speed and height in pipes, tanks, spray bottles and aircraft.
In this topic
- Where does the extra speed come from?
- Bernoulli's equation and its assumptions
- Energy per unit volume
- Bernoulli's principle
- Worked example: a narrowing pipe
- Measuring flow speed
- How a wing makes lift
- Worked example: a draining tank
- Worked example: water to a top floor
- Power in fluid flow
- Common mistakes to avoid
- Key takeaways
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