Module 4- Real-World Physics Discussion
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Embry-Riddle Aeronautical University *
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Course
102
Subject
Aerospace Engineering
Date
Nov 24, 2024
Type
docx
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2
Uploaded by CountHyenaPerson312
1
Hi Class,
My discussion is on Pressure.
Pressure is one of the widely evaluated quantities of everyday life since it
plays an integral part in complex processes such as flying a plane or
simple tasks such as taking a breath. Interestingly the way in which we
measure pressure has remained the same since the 1640’s when the
mercury barometer was invented by Evangelista Torricelli (Hendricks,
2018). Pressure is defined as the amount of force per unit area or in
simpler terms as the physical force excreted on an object. This forms the
basis of the formulae of pressure which is Force per unit area (F/A). The SI
unit of pressure is Pascal (Pa) which is equivalent to one newton per
square meter (N/M^2) and as such, pressure can also be expressed as the
amount of energy per unit volume because the SI unit of energy is Joules
which is defined as one-newton meter (Hendricks, 2018).
There are several types of pressures these include atmospheric pressure,
absolute pressure, gauge pressure, and differential pressure. Atmospheric
pressure is the force excreted on the surface of the earth by air above due
to its gravitational pull towards the earth usually measured using a
barometer. Differential pressure refers to the difference in pressure
between two given points; gauge pressure refers to the difference
between a measured point and the atmosphere while absolute pressure is
the combined pressure of the atmosphere and the evaluated place.
Pressure plays an integral part in aviation, for an airplane to take to the
skies; a force equal to or greater than the force of gravity must be
generated, this force is referred to as lift which emanates from the flow of
air over an airfoil, the shape of the airfoil make air to flow faster at the top
than at the bottom. The fast flow of air decreases the surrounding air
pressure since the air pressure below the airfoil is greater than the
pressure above the lift is achieved. The link below shows the application of
pressure in achieving a lift
https://www.youtube.com/watch?
v=YDeQXPNpLeY
Links to an external site.
References.
Doofer911. (2016). How Wings ACTUALLY Create Lift! In
YouTube
.
https://www.youtube.com/watch?v=YDeQXPNpLeY
Hendricks, J. (2018). Quantum for pressure.
Nature Physics
,
14
(1), 100–
100. https://doi.org/10.1038/nphys4338
MIT Department of Aeronautics and Astronautics. (1997, March
16).
Theory of Flight
. Mit.edu.
https://web.mit.edu/16.00/www/aec/flight.html
2
Toppr-guides
. (2019, July 5). Toppr-Guides.
https://www.toppr.com/guides/physics/force-and-pressure/introduction-to-
pressure
What is Differential Pressure?
(2022). Www.variohm.com.
https://www.variohm.com/news-media/technical-blog-archive/what-is-
differential-pressure-
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