Bernoulli's Principle relates fluid speed and pressure. According to this principle, as the fluid speed increases, what happens to the pressure?

Study for the Praxis Physics Exam with interactive questions and detailed explanations to enhance your understanding of physics concepts. Prepare for your exam efficiently!

Multiple Choice

Bernoulli's Principle relates fluid speed and pressure. According to this principle, as the fluid speed increases, what happens to the pressure?

Explanation:
When a fluid speeds up along a streamline, the static pressure drops. This follows from Bernoulli’s idea that, for steady, incompressible flow in a horizontal path, the sum P + ½ρv² stays constant. If the speed v increases, the kinetic energy term ½ρv² grows, so the static pressure P must decrease to keep the total constant. That’s why you see lower pressure in fast-flow regions, such as air moving quickly over the top surface of a wing or through a constricted pipe. So, as speed increases, the pressure decreases.

When a fluid speeds up along a streamline, the static pressure drops. This follows from Bernoulli’s idea that, for steady, incompressible flow in a horizontal path, the sum P + ½ρv² stays constant. If the speed v increases, the kinetic energy term ½ρv² grows, so the static pressure P must decrease to keep the total constant. That’s why you see lower pressure in fast-flow regions, such as air moving quickly over the top surface of a wing or through a constricted pipe. So, as speed increases, the pressure decreases.

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