Review Questions

What are the four forces of flight?

• Drag, Thrust, Weight and Gravity

• Drag, Thrust, Propulsion and Lift

• Drag, Thrust, Lift and Weight

• Drag, lift, thrust, speed

Which of the four forces of flight opposes weight?

• Propulsion/Thrust

• Drag

• Lift

• All of the above

Bernoulli's principle helps describe which of the four forces of flight?

• Propulsion/Thrust

• Weight

• Lift

• Drag

Which law states that for every action, there is an equal and opposite reaction?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Fourth Law

Drag in an airplane is...

• The force that slows down an aircraft

• The force that helps the plane move upwards

• The force that speeds up an aircraft

• The Force that pulls the aircraft down and helps it land

When an object is aerodynamic it means

• It means that the object is designed to increase drag and disrupt airflow around it.
• It means that the object is designed to be heavy and slow-moving.
• It means that the object is designed to be unstable and difficult to control.
• It means that the object is designed to go through the air easier without as much drag resisting forward motion.

When fluids travel faster, it creates...

• high pressure

• no pressure

• some pressure

• low pressure

What do hot air balloons use to produce lift?

• propellers
• wings
• heated air
• helium

What is air?

• Air is a fluid

• Air is an invisible gas made of different gases surrounding the earth

• Air is a mixture of mainly nitrogen and oxygen

• All of the above

Why is air a fluid?

• Air is a fluid because it is a liquid.
• Air is a fluid because it is a solid.
• Air is a fluid because it can flow and take the shape of its container.
• Air is a fluid because it is a gas.