In fluid dynamics, Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy. ... When the air speeds up, the pressure also decreases. Past the constriction, the airflow slows and the pressure increases.

Why is bernoullis principle true?

The significance of Bernoulli's principle can now be summarized as "total pressure is constant along a streamline". If the fluid flow is irrotational, the total pressure on every streamline is the same and Bernoulli's principle can be summarized as "total pressure is constant everywhere in the fluid flow".

How does Bernoulli's principle apply to everyday life?

In real world we can give numerous examples of Bernoulli's principle being applied: When a truck moves very fast, it created a low pressure area, so dusts are being pulled along in the low pressure area. ... Without proper use of Bernoulli's principle the flight body will break in higher speed.