Multiple choice

Which of the following principles is related to lift of an aeroplane during its flight?

  1. Surface tension

  2. Bernoulli's principle

  3. Capillary action

  4. Gravitational force
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases. Airplane wings are shaped to create higher air speed over the top, resulting in lower pressure above the wing and generating lift.

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