02_03. Physics of flight

What is the definition of lift?

• Lift is the downward force that counteracts gravity and keeps an airplane in the air.

• Lift is the upward force that counteracts gravity and keeps an airplane in the air.

• Lift is the sideways force that counteracts gravity and keeps an airplane in the air.

• Lift is the forward force that counteracts gravity and keeps an airplane in the air.

How is lift primarily generated?

• By the speed of the airplane.

• By the weight of the airplane.

• By the shape of the airplane's wings as they move through the air.

• By the color of the airplane.

Why is lift important for airplanes?

• Without lift, airplanes would move faster.

• Without lift, airplanes would be more stable.

• Without lift, sustained flight would be impossible for heavier-than-air aircraft.

• Without lift, airplanes would consume less fuel.

What causes the pressure difference in Bernoulli's Principle?

• Air moves faster over the curved upper surface of the wing, creating lower pressure.

• Air moves slower over the curved upper surface of the wing, creating higher pressure.

• Air moves faster under the wing, creating higher pressure.

• Air moves slower under the wing, creating lower pressure.

What is the result of the pressure difference between the upper and lower surfaces of a wing according to Bernoulli's Principle?

• It creates a downward suction force.

• It creates an upward suction force.

• It creates a sideways suction force.

• It creates no suction force.

How does the pressure difference contribute to the overall lift force on the wing?

• It reduces the lift force.

• It has no effect on the lift force.

• It contributes significantly to the lift force.

• It creates a downward lift force.

What happens to air flow when it passes through a narrower section of a tube or channel?

• It slows down

• It speeds up

• It remains constant

• It stops

What is the effect on pressure when the velocity of air flow increases in a constricted area?

• Pressure increases

• Pressure remains the same

• Pressure decreases

• Pressure fluctuates

In which application is the Venturi effect principle used to enhance lift generation?

• Car engines

• Wing design

• Water pumps

• Air conditioning systems

What does gravity constantly do to an airplane?

• Pushes it upwards

• Pulls it towards the Earth's center

• Moves it sideways

• Increases its speed