To ensure there is as little friction or drag as possible for example the streamlined helmets that bicyclists wear or the full body swim suits that are becoming popular for swimmers. Swimmers also shave body hair to streamline their bodies and reduce drag.
Three sports that streamlining is very important is NCAA baseball as Ohio State has recently streamlined there stadium thanks to alumni Nick Swisher. Another sport is NCAA football, where Notre Dame is known for streamlining. And in the professional industry when there's moves that need to be made to make your team better like the Detroit Lions streamlining is a common term used by the general manager. I found this info here.
to reduce air resistance or drag.
it is used to help athletes improve their performances
*Clorox water is used for the sport of swimming
Streamlining helps anything move faster through the air.
Smoothing an object's shape is called streamlining. It is used for improving passage through air as well as water.
A K2 Apache is used for the sport of skiing.
Incredibly ! -In rocket flight streamlining is the single most important factor.
clustering
The sport of horse racing.
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A streamlining boat is one that moves through the water with ease and doesn't have speed or progress problems.