# The 4 Forces of Flight

## Force 1: Lift

Lift is a force made by a solid moving through a fluid like air. Lift is the force that opposes the weight or an airplane and holds the airplane in the air. Lift is generated by all parts of the airplane, but the most lift comes from the wings or the airplane....... NO fluid no lift!

## Force 2: Weight and Gravity

Weight is a force caused by the gravitational relationship with earth. Humans are more aware of weight because we have weight and see it every day, we can measure our weight on a bathroom scale but this type of weight is way different and can not be measured by a bathroom scale its measured by a spring scale or a hydraulic or pneumatic scale. Gravity holds all objects to the ground.the lift, lifts an airplane up and the gravity makes a balance and hold the plane in place.

## Force 3: Thrust

Thrust is a force described by newtons second and third law. The newtons principal is the universal gravitation states that any two bodies attract to each other with a force. Thrust is when a system expels or accelerates mass in the same direction. The accelerated mass will cause a force of equal magnitude, but opposite direction of a system.

## Force 2: Drag

Drag is a mechanical force generated by solid moving through air. In this case an aircraft. How is drag generated you may ask. Drag is generated by interaction ( wings and air) and contact (aircraft in the air.) It is not generated by a force field like it is in the avengers. Drag holds you back and thrust (the opposite) pushes you forwards.

## Bernoulli's Principle

Bernoulli's principal ties in with the four forces of flight. Daniel Bernoulli found that an increases of speed in the fluid occurs simultaneously with a decrease in pressure or decrease in fluids potential.