空氣阻力的發明除左降落傘還有什麼？

羽毛球也是啊!????

你寫漏了兩字令你句子不暢順，你應該寫「利用空氣阻力的發明...................」，答案是還有，風帆，即帆船，風車，如荷蘭風車。

2015-01-01 02:15:16 補充：
說漏了飛機的機翼也是。

2015-01-01 14:04:52 補充：
現解說為什麼風帆，風車，機翼是利用空氣阻力

很簡單，如你阻不到風，風怎麼會吹動你﹖

2015-01-01 14:51:47 補充：
那麼降落傘是受風吹動嗎﹖這是當然的，如風吹得更勁時。

2015-01-01 19:10:40 補充：
說得更明顯，降落傘是向下墮的，應無異議，相對地風是向上吹的，但問題是風會否把你吹得更高。所以在討論風阻問題上，風是不動的，在上述例子中，風是動的，但這樣沒有衝突，簡單說，如果沒有風阻，風就不會給你壓力。

風帆有很多種，部份主要功能就是獲取空氣阻力，所以風帆是算數的。其實機翼的副翼具有2個功能，一個在降落時作AIR-BRAKE之用(利用空氣阻力減緩速度)；但亦是作為飛機爬升之用。這其實與風帆的情況一樣.........
其他還有﹕紙風車、竹青亭、BERMINTON、足演。

2015-01-02 02:42:55 補充：
天同你是誤解左風帆的流體動力學，亦錯誤理解流體動力。
飛機如果唔移動，加上空氣無流動，根本甚麼"阻力"、"AIR BRAKE"、"浮力"都沒有。
降落傘因物件向下運動，產生一個"虛擬運動"，空氣才產生阻力，形成"AIR BRAKE"效果。
風帆是欄截流通的空氣，轉化空氣的阻力，而獲取船隻的動力。

在以上的例子，可知道空氣阻力，必須要有流動空氣；無論此向量是"真"(風自然流動)、或是"假"(虛擬產生，飛機飛行、降落傘下落)。

I don't think examples like a sail, a windmill etc. are application of air resistance. They only make use of air movement (空氣流動) to function, not air resistance (空氣阻力).

Apart from parachute, another application of air resistance is the "flap"(襟翼) on the wings (機翼) of an aeroplane. When extended, a flap serves as an "air brake" (空氣煞制) that slows down the flying aeroplane by increasing air drag (空氣阻力), but maintains the lifting force. The use of flaps is particularly important during the landing of an aeroplane.

You may refer to the following web-page for an explanation on the function of aeroplane flaps.

http://en.wikipedia.org/wiki/Flap_(aeronautics)



2015-01-01 15:09:03 補充：
I don't think the idea that a sail or the likes use "air resistance" to function is correct.
A sail makes use the impact force produced from air movement. In still air, a sail doesn't work. But air resistance, or air friction, is a natural phenomenon that exhibits even in still air.

2015-01-01 15:11:56 補充：
Air resistance (friction), like solid friction, always acts in direction opposing motion. The force that propels a sail to move forward is clearly not frictional force (air resistance force).

2015-01-01 15:15:05 補充：
A flap on the wings of a plane serves two purposes, acts as an "air brake" to slow down a flying plane and/or providing extra lifting force to the plane. When serving as an air-brake, air resistance comes into play.

2015-01-01 15:19:12 補充：
Moreover, I am rather surprised that the Chinese word "阻" in the term "阻力" has been wrongly interpreted as "blocking". This is completely deviated from the concept of (air) "resistance" in physics.