Can someone please tell me how aerodynamics has to do with the following? (please see details)?

Question

Can you please give me a brief explanation on how aerodynamics affects the following:

football, diving, ski jumping, bobsledding, wind surfing, achery, sports car or racing.

You don't need to do all of them, just as least TWO. 2
Just so you know, this isn't for schoolwork. I made a bet with my stupid brother that if i could answer two of those he could give me ten bucks.
PLEASEEE! Ten points for best answerrrr!

Please answer quickly - my stupid idiot of a brother only gave me one day!!!!

THANKS

Answer 1

Less wind resistance equals better aerodynamics so..
a car rounded and low to the ground has less wind resistance for better performance and better fuel economy.

Answer 2

JUST by random chance I came across yahoo answers... I might be able to help you burn your bro as I've actually been a coach for bobsledding in the US for the last 10 years (no kidding). What you want to know? All the answers above are fairly correct. In a nut shell it's all about drag. Check out http://www.formulasun.org/education/seles13.html for a simple explanation. The theoretical optimal shape for the lowest coefficient of drag is a tear drop. Sled design (up to a point - driving does count!) as well as the position of the athletes in the sled can affect aerodynmics in bobsledding. Here's another link... http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=16298374&dopt=Abstract

Basically, the more aerodynamic you are, the faster you generally go.

Hope that helps.

Answer 3

there is a friction wall at 50 miles per hour.
Human powered (cycle) transportation could not break this barrier for ages. The answer came from a low lay on your back cycle covered with a highly aerodynamic shell.
This light weight style of cycle allows the coefficient of friction to be reduced sufficiently to break the barrier.
A cyclist going down a very steep hill will slow (relatively)if the rider makes himself large by sitting up and and spreading their limbs to catch the air.

Answer 4

the answer to all of them is air friction. Friction slows things down. The less aerodynamic the more power will be needed to move something. Drop a piece of paper on its edge then drop it on the flat side. When you drop it on its edge it will fall faster because of aerodynamics.

Answer 5

areodynaics equals less drag due to wind resistance....football is designed to fly in the air much farther than a round ball the arrows in srchery are very narrow to glide through the air just like fast cars are low profiled with contoured windshields for least resistance the rest should be obvious goodluck