Andrew's+four+forces+of+flight

=Andrew's Four Forces of Flight=

The Four Forces of Flight are weight, drag, lift and thrust. Weight means the downward force that's always directed towards the center of the earth. Drag means the resistance of air against anything that moves through it. Lift means an upward pull. Finally, thrust means any force that moves a plane forward. This is what each force does to an airpane. Weight weighs the plane down. Lift holds the plane in the air. Drag resists motion of an object moving through the air and thrust overcomes drag. The Bernoulli principle is thought to create lift. The Bernoulli Principle states that ,"When an object is in front of fast moving air, the higher in the air the object is than the air will push the object higher in the air ." Here are how two different forces are generated. One force(thrust) is generated by the planes engine. Another force called lift is generated by every part of the plane.
 * __THE FOUR FORCES OF FLIGHT__**
 * __HOW FORCES ARE GENERATED__**

Alot of planes have wings built in a shape called an Airfoil. As the plane moves forward, the curved shape of the airfoil cause air passing above the wing to move faster than air passing below. For an airplane to stay in flight, Lift is needed to stay above the weight of the airplane. The Bernoulli principle is thought to create lift. It states that if you put an object in front of fast moving air, when the object if higher in the air, the force of the air will lift the object higher.
 * __AIRFOIL__**

__**NEWTONS LAWS APPLIED TO PLANES**__ This is how Newton's laws apply to airplanes. Sir Issac Newton's 1st law is used to thrust an airplane forward. Newton's 1st law states that every object persist in its state of rest or uniform motion in a straight line unless it is compelledto change that stateby forces impressed on it. Sir Issac Newton's 2nd law describes how drag slows down an airplane. Newton's 2nd law states that the relationshipbetween an objects mass M, its acceleration A, and the applied force F=MA. Acceleration and force are vectors in this law the direction of the force vectors is the same as the direction of the acceleration vector.