Question Detail
Question
Which is the most accurate statement of Bernoulli's Principle? I. Fast-moving air causes lower pressure II. Lower pressure causes fast-moving air III. Fast-moving air causes constant pressure
Correct Answer
Option A is the correct answer.
Detailed Explanation
Bernoulli's principle states that in a flowing fluid, an increase in velocity occurs simultaneously with a decrease in pressure. It's a cause-and-effect relationship where the velocity and pressure are correlated, but it's more accurate to say that fast-moving air is associated with lower pressure. Statement I captures this correctly. Statement II reverses the causality, which is not accurate from a physical perspective—pressure differences cause acceleration, not the other way around.
Hint
Bernoulli's principle describes a correlation: higher speed regions have lower pressure.