Principles of Flight

What are the four fundamental forces of flight?

• Lift, weight, drag, and thrust

• Gravity, velocity, pressure, and acceleration

• Friction, tension, compression, and shear

• Centripetal force, centrifugal force, gravitational force, and electromagnetic force

Who is Daniel Bernoulli?

• An 18th-century Swiss mathematician and physicist

• An aviation pioneer

• The inventor of the airplane

• A famous pilot

What is Bernoulli's Principle?

• A concept in fluid dynamics that explains the relationship between pressure and velocity in a fluid

• A principle that describes how airplanes generate lift

• A theory about the behavior of air currents

• A mathematical equation for calculating drag

How does Bernoulli's Principle relate to airflow over a wing?

• As air flows over the curved upper surface of a wing, its velocity increases and its pressure decreases, creating lift

• As air flows over the flat lower surface of a wing, its velocity increases and its pressure decreases, creating lift

• As air flows over the curved upper surface of a wing, its velocity decreases and its pressure increases, creating lift

• As air flows over the flat lower surface of a wing, its velocity decreases and its pressure increases, creating lift

What is the role of lift in keeping an airplane in the air?

• Lift opposes weight and generates an upward force that allows the airplane to take off and stay in the air

• Lift opposes drag and helps the airplane move forward

• Lift opposes thrust and slows down the airplane

• Lift opposes gravity and keeps the airplane from falling

Where does weight force act on an aircraft?

• Through the center of gravity

• Through the center of lift

• Through the center of thrust

• Through the center of drag

What is drag?

• The opposing force that acts in the opposite direction to the aircraft's motion

• The force that propels an airplane forward

• The force that keeps an airplane in the air

• The force that opposes weight

What is thrust?

• The force that propels an airplane forward

• The opposing force that acts in the opposite direction to the aircraft's motion

• The force that keeps an airplane in the air

• The force that opposes weight

What is the result of all forces being in equilibrium during straight and level flight?

• The plane is neither ascending nor descending, and the aircraft is neither speeding up nor slowing down

• The plane is ascending, and the aircraft is speeding up

• The plane is descending, and the aircraft is slowing down

• The plane is ascending, and the aircraft is neither speeding up nor slowing down

What is the purpose of vectors in aviation?

• To describe where something is and which way it's going

• To calculate the plane's velocity and acceleration

• To navigate and control the plane

• All of the above