Take to pieces of paper and hold them side by side and an inch apart and then blow between them. Will they come closer together, move further away, or stay in the same place?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Take to pieces of paper and hold them side by side and an inch apart and then blow between them. Will they come closer together, move further away, or stay in the same place?

N.B: I tried two times and got a different outcome. Can you explain me the outcome? Am I doing wrong?

Expert Solution
Step 1

We will use Bernoulli's principle in this problem. 

According to Bernoulli's principle, when we will increase speed of the moving gas then pressure within the gas will decreases.

In other words we can say that decrease in static pressure will cause decrease in potential energy because according to this principle sum of mechanical energy is constant. 

Mechanical energy = Potential Energy + Kinetic Energy

Mathematically we can express this relation as - 

Physics homework question answer, step 1, image 1

Where 

m = Mass 

v = Speed 

Hence, Increase in speed will increase kinetic energy so potential energy will decrease.

We also know that potential energy depends on distance between two objects. 

 

 

 

 

 

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