Chapter 8, Problem 20RQ

What do peaked roofs, convertible tops, and air-plane wings have in common when air moves factor across their top surfaces?

To determine

The comparison of peaked roofs, convertible tops and air-plane wings, when air moves across their top surfaces.

Answer to Problem 20RQ

Peaked roofs, convertible tops and air-plane wings experience a net upward pressure when air moves across their top surface.

Explanation of Solution

When air moves across the top surface of peaked roofs, convertible tips and air-plane wings then according to the Bernoulli’s principle, the air on the top surface moves with the high velocity with a decrease in the pressure.

On top surface, there is less pressure as compared to the pressure caused by the air below. Due to the air pressure difference created at lower and bottom of the wings or roofs, the object experiences a net upward pressure force.

Conclusion:

Therefore, peaked roofs, convertible tops and air-plane wings experience a net upward pressure have in common when air moves across their top surface.