If the hand is removed, the kite will fall. At the same time, wind passing over the top of the kite creates an area of low pressure, like a vacuum, along the back of the kite. This creates a pull from behind. A kite is effected by thrust, drag and by gravity. Drag can also result from turbulence behind the kite.
Gravity is the downward force created by the weight of the kite.
Thrust is the power of the wind which creates lift. To fly, a kite needs to have enough lift to overcome gravity and drag. All of these forces - lift, drag, gravity, and the thrust of the wind come together in the kite at a place called the center of pressure . And not surprisingly, that's where you tie your kite string. We call this special place the tow point .