# What are the factors that cause lift?

In summary, lift is the upward force that allows an object to stay in the air and overcome gravity. It is generated by the movement of air around the object's surface. The main factors that contribute to lift are the object's shape, speed, and air density. The shape of an object, particularly an airfoil shape, plays a crucial role in creating a difference in air pressure and generating lift. Air density also affects lift, with higher density resulting in more lift. The angle of attack, or the angle at which an object meets the air, can also affect lift, with a larger angle of attack increasing lift up to a certain point before causing a stall.

## Homework Statement

Using sketches and equations briefly describe how Bernoulli's equation and other factors cause lift force to be generated by a wing.

## Homework Statement

Using sketches and equations briefly describe how Bernoulli's equation and other factors cause lift force to be generated by a wing.

## The Attempt at a Solution

http://en.wikipedia.org/wiki/Wing

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## 1. What is lift?

Lift is the upward force that allows an object, such as an airplane, to stay in the air and overcome the force of gravity. It is generated by the movement of air around the object's surface.

## 2. What are the factors that contribute to lift?

The main factors that contribute to lift are the shape and angle of the object, the speed of the object, and the density of the air. These factors affect how much air is deflected by the object's surface, creating a difference in air pressure that results in lift.

## 3. How does the shape of an object affect lift?

The shape of an object plays a crucial role in generating lift. Objects with a curved or streamlined shape, such as airplane wings, are designed to create a lower pressure area above the object and a higher pressure area below it, which results in lift. This shape is known as an airfoil.

## 4. What is the role of air density in lift?

Air density refers to the amount of mass or air particles in a given volume of air. As the density of air increases, there is more air to be deflected by the object's surface, resulting in more lift. This is why airplanes have a harder time generating lift at higher altitudes where the air is less dense.

## 5. How does the angle of attack affect lift?

The angle of attack refers to the angle at which an object, such as an airplane wing, meets the oncoming air. A larger angle of attack increases the amount of lift generated, up to a certain point. If the angle of attack becomes too steep, it can result in a stall, where the air can no longer flow smoothly over the object's surface and lift is lost.

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