Wednesday, June 22, 2016

My Science Essay


Aerodynamics is the study of how things move and interact with the air. Areodynamics is an awesome part of our world, it is key part of our world as it like I said, is how things move though the air. One question I asked is how do different shapes effect aerodynamics and what shapes have less drag? The concepts I am looking at are lift, drag, thrust and weight.


Lift is caused when low pressure on one side of the wing (the top side) generates high velocity and when the bottom side generates high pressure and low velocity, or to simplify it, the high pressure generates the lift because the pressure wants to go up and the low pressure on the top wants to go down thus creating perfectly balanced air flow. To generate lift you must have thrust or propulsion and streamlined wings otherwise instead of going up gravity will pull you down. The slower you go the more time gravity has to react and to pull you down. But the faster you go the less time has to react and you have less chance of falling down.


Drag is the opposite to lift. Drag slows you down and is caused if you don’t have a streamlined body. Cars, planes and rockets are all designed to reduce the amount of drag because the drag resists, pushing in the opposite direction to the which requires more thrust or force, sometimes drag is a good thing like on planes and some other vehicles which have air brakes. They increase the amount of drag which slows you down. It also a bad thing like when you are trying to go fast as it pushes against you.

Thrust and weight

Thrust is what pushes you forward and weight is just how heavy something is. Thrust or force is probably the most important concept as it creates all the other things. Thrust is created by many things. It can be generated by anything. It's whatever you use to go forward like your muscles or an engine. Thrust has an impact on the speed. There are different types of speed. This is called flow velocity. There are 3 main types: Supersonic flow, which is greater than the speed of sound, hypersonic flow which is much greater than the speed of sound and Subsonic flow which is below the speed of sound. Weight plays into the formula because whatever you do there's weight and like drag, it slows you down. Weight is another word for gravity and to overcome gravity you must have all the other concepts.


In conclusion lift is what keeps you up, drag is what slows you down, thrust is what moves you forward and weight or gravity is what pulls you down. I have set out to find how different shapes effect aerodynamics and what shapes generate less drag. Well shapes that generate less drag are more streamlined. Areodynamics is an awesome part of our world, I hope you have learned something.

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