Question

why moving air provides a lift ?

Answer 1

I will give u a example
a region in which wind is flowing is always a low pressure zone . take two balloons and hang them at a distance. now keep a fan in between them such that air can be flown in the region between these balloons but not direct toward balloon when you switch on the fan u can observe that these balloons tend to move towards each other rather than getting blown away it happens because pressure in zone between them is heavenly reduce due to high speed wind but pressure on the other side is normal . hence balloons tend to move from high pressure to low pressure zone.
I hope it's clear

Answer 2

the flowing air provides a lift as it decreases the pressure and provides motion in opposite direction. it provides the basic theory of magnus effect. lets take an example of airplane wing. airplane wing is created in such a manner that it tends to keep more number of air particles above and less at the base. the air below the plane already is low in pressure and further the jet fan engine on the wing pushes it backwards providing a speedy motion to the plane. even after its huge size and weight, the plane keeps floating in the air. thus moving air provides a lift by decreasing the pressure. other example is my personal favourite, its is of banana kick we do in football sending the ball flying in a crescent shape. when we kick the ball in the lower right corner it goes spinning, giving air around it motion. the air is pushed towards the outer side of the ball decreasing the pressure towards the inner side. ti not only gives the ball lift but also changes the direction of the  motion. thus we can say that moving air provides lift.
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