EOM 231.02

Air acts like a fluid to the extent that it has...

• Density, Pressure, Speed

• Inertia, Speed, Pressure

• Movement, Humidity

• Mass, Water, Gasses

Newton’s third law of motion allows the aircraft wing, by applying a force that changes the motion of air, to develop lift through an (a)   and equal reaction.

As stated in Bernoulli's Principle: When air speed increases, the pressure...

• disappears

• spins

• increases

• decreases

Choose one of the three topics I talked about (Newton's 3 Laws, Bernoulli's Principle, or angle of attack) and describe how it contributes to aircraft lift.

Answer explanation

answer's should include:

Newton's Laws

- air remains in motion when it is moving

- a force must be applied to change the air's motion

- the aircraft wing develops lift through an opposite and equal reaction

Bernoulli's Principle

- A wing uses Bernoulli’s Principle to deflect air, which causes an equal and opposite reaction

- if air speed increases, pressure decreases and if speed decreases, pressure increases

Angle of Attack

- The greater the wing’s angle of attack, the more air the under-surface of the wing will encounter, thereby generating more lift. This is a direct relationship between angle of attack and lift

The angle of the wing’s under-surface, which encounters the moving air, is called the wing’s (a)   .

What relationship exists between air speed and air pressure?

• Backwards Relationship

• Inverse Relationship

• aerodynamic Relationship

• Reciprocal Relationship

How does air follow Newton’s first law of motion?

• When in motion, a force must be applied to change air’s motion.

• When in motion, air tends to spin around itself.

• When in motion, air tends to slow down.

• When in motion, air tends to remain in motion.

Which surface of an aircraft wing is curved outward?

(a)  

The front of the wing is called the ________(1) edge and the back is called the ________(2) edge.

• 1. Leading

  2. Trailing

• 1. Guiding

  2. Tailing

• 1. Directing

  2. Downward

• 1. Frontward

  2. Rearward

Explain how the angle of attack generates lift.

Answer explanation

The greater the wing’s angle of attack, the more air the under-surface of the wing will encounter, thereby generating more lift. Keep in mind that there is a limit to the amount of lift that can be produced by merely increasing the angle of attack. The wings could abruptly "stall" and stop generating lift.