Applications of Bernoulli Theorem

Which of the followings are Applications of Bernoulli’s Theorem:

  1. Blowing off roofs during wind storm
  2. Aerofoil lift
  3. Bunsen burner
  4. Venturimeter

1.1 only

2.2 only
3.1, 2 only

4. 1, 2 , 3, 4

EXPLANATION

✅ 1. Blowing off roofs during wind storm

  • In a storm, wind speed over the roof increases → air pressure decreases on top.

  • Inside the house, pressure is relatively higher, pushing the roof upward.

  • This is explained by Bernoulli’s principle.
    ✔️ Yes, it’s an application.

✅ 2. Aerofoil lift (Airplane wing)

  • Air moves faster over the curved upper surface than below the wing.

  • Lower pressure above, higher pressure below → generates lift.
    ✔️ Classic application of Bernoulli’s Theorem.

✅ 3. Bunsen burner

  • Gas flows at high speed through a nozzle → pressure decreases.

  • This low pressure draws in air through side holes → helps mixing of air and gas.
    ✔️ Yes, Bernoulli’s principle explains this.

✅ 4. Venturimeter

  • Device used to measure flow rate of liquids in a pipe.

  • Works based on pressure difference created by fluid speed change at constrictions.
    ✔️ Direct application of Bernoulli’s Theorem.

✅ Final Answer: 4. 1, 2, 3, 4

APPLICATIONS OF BERNOULLI THEOREM