Chapter 10, Problem 17Q

To determine

The direction in which papers will move. If two piece of paper hangs vertically.

Answer to Problem 17Q

When the air passes between the papers. At that time the pressure between the papers is lowered. Because of the lowered pressure the papers will moves towards each other.

Explanation of Solution

Introduction:

The above concept is based on the Bernoulli’s principle. According to Bernoulli’s principle the speed of the gas flow increases, the pressure decrease. It can be explained briefly in the explanation.

The papers will move towards each other. Bernoulli’s principle says that as the speed of the gas flow increases, the pressure decreases. When the papers are hanged vertically with each other the air passes between the papers, the air pressure between the papers is lowered. On the other hand the air pressure on the other side of the papers is greater than that between the papers, and so the papers are pushed together. When there is no considerable change in height.

Conclusion:

The whole concept is based on the Bernoulli’s principle. On the Basis of above discussion, it can be concluded that when the air passes between the papers. At that time the pressure between the papers is lowered. Because of the lowered pressure the papers will moves towards each other.