The main principle of a parachute is to use the resistance of the air to slow down the rate of descent. When the parachute opens, the umbrella cloth forms a large surface area, the friction and collision between the air and the umbrella cloth will produce resistance, this resistance is directly proportional to the speed of descent. By adjusting the shape, area and material of the parachute, the descent speed can be controlled, making the landing process smoother.
In addition to providing a safe way to land, parachutes have a number of other expanded roles. For example, in an emergency, parachutes can be used as an escape tool to help people land safely from tall buildings, airplanes and other high places. In addition, parachutes are also widely used in the fields of airdrops, rescue operations, air sports and so on.
In short, the role of parachute is to slow down the descent speed by increasing the resistance and provide a safe way to land. It also has expanded applications such as escape, airdrop and sports.