Mastering Physics?

Question

What is the lift (in newtons) due to Bernoulli's principle on a wing of area 84 m2 if the air passes over the top and bottom surfaces at speeds of 240 m/s and 150 m/s, respectively?

Answer 1

Step 1:

The area of the wing is .

The speed of the air passes over the bottom of the wing is .

The speed of the air passes over the top of the wing is .

The Bernoulli's equation is .

Since the thickness of wing is small, is negligible.

.

.

Step 2:

The net force on the wing is .

The density of air is .

Substitute , and .

.

The net force on the wing is .

Solution:

The net force on the wing is .