# The Physics Of An Airplane Quiz

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| By Erin_alece
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Erin_alece
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This quiz is to test your knowledge of the basic principles of flight.

• 1.

### What is NOT one of the four aerodynamic forces?

• A.

Lift

• B.

Pressure

• C.

Thrust

• D.

Weight

• E.

Drag

B. Pressure
Explanation
Pressure is not one of the four aerodynamic forces. The four aerodynamic forces are lift, thrust, weight, and drag. Pressure is a measure of the force exerted by a fluid on a surface, but it is not considered one of the primary forces that act on an object in aerodynamics.

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• 2.

### Which aerodynamic force is known as "the resistance of air"?

• A.

Thrust

• B.

Weight/Gravity

• C.

Lift

• D.

Drag

D. Drag
Explanation
Drag is the aerodynamic force that is commonly referred to as "the resistance of air." It is the force that opposes the motion of an object through a fluid, in this case, air. Drag is caused by the interaction between the object and the air molecules, resulting in a force that acts in the opposite direction to the object's motion. It is an important factor to consider in various applications, such as designing vehicles and optimizing their efficiency.

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• 3.

### What is a "natural" force acting upon the airplane?

• A.

Weight/Gravity

• B.

The pilot

• C.

The propeller

• D.

The Wings

A. Weight/Gravity
Explanation
Weight/Gravity is a natural force acting upon the airplane. Weight is the force exerted by gravity on the mass of the airplane, causing it to be pulled towards the center of the Earth. This force affects the airplane's stability, lift, and overall performance during flight. It is a fundamental force that must be taken into account in aviation to ensure safe and efficient operations.

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• 4.

### Who were the brothers that invented the airplane?

• A.

Bill and Harry Wright

• B.

Milton and Kurtis Smith

• C.

Orville and Wilbur Wright

• D.

Ben and Jerry

C. Orville and Wilbur Wright
Explanation
Orville and Wilbur Wright are the correct answer because they were the brothers who invented the airplane. They successfully designed, built, and flew the world's first successful airplane in 1903. Their invention revolutionized the field of aviation and paved the way for modern air travel.

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• 5.

### Which principle explains how an airplane flies?

• A.

Bernoulli's Principal

• B.

Brownian's Principal

• C.

Fizeau's Principal

• D.

Schroedinger's Principal

A. Bernoulli's Principal
Explanation
Bernoulli's Principle explains how an airplane flies. According to this principle, as the speed of a fluid (such as air) increases, its pressure decreases. When an airplane moves through the air, the shape of its wings causes the air to move faster over the top surface and slower underneath. This creates a pressure difference, with lower pressure on top and higher pressure underneath the wings. The pressure difference generates lift, allowing the airplane to stay airborne.

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• 6.

### Which part of the airplane creates the lift?

• A.

The Pilot

• B.

The Propeller

• C.

The Rudder

• D.

The Wings

D. The Wings
Explanation
The wings of an airplane create lift. Lift is the force that opposes gravity and allows the airplane to stay in the air. The shape of the wings, along with the airflow over them, creates a pressure difference that generates lift. As the air moves faster over the curved top surface of the wing, it creates lower pressure, while the slower-moving air beneath the wing creates higher pressure. This pressure difference produces lift, enabling the airplane to fly.

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• 7.

### What force must be created by an airplane, in order to overcome drag?

• A.

Thrust

• B.

Weight/Gravity

• C.

Lift

• D.

Pressure

A. Thrust
Explanation
An airplane needs to create thrust in order to overcome drag. Drag is the force that opposes the motion of the airplane through the air. To counteract this force and maintain forward motion, the airplane generates thrust by using engines or propulsion systems. Thrust is the force that propels the airplane forward, allowing it to overcome drag and move through the air.

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• Current Version
• Mar 22, 2023
Quiz Edited by
ProProfs Editorial Team
• Jan 22, 2009
Quiz Created by
Erin_alece

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