AFJROTC // Science of Flight: Chapter 1 Lessons 1 – 3 Questions and Answers Latest Version Already Passed

AFJROTC // Science of Flight: Chapter 1 Lessons 1 – 3 Questions and Answers Latest Version Already Passed What is the primary purpose of flight? To overcome gravity and lift an object into the air What force is responsible for lifting an aircraft off the ground? Lift What is the force that pulls an object towards the Earth's surface? Gravity Which of the following is necessary for generating lift? Air moving over and under the wings What is the role of thrust in an aircraft? To overcome drag and propel the aircraft forward 2 What is the force that resists the forward motion of an aircraft? Drag What are the four fundamental forces that act on an aircraft in flight? Lift, weight, thrust, and drag What is Bernoulli’s principle? It explains how an increase in the speed of a fluid (like air) results in a decrease in pressure How does the shape of an aircraft wing contribute to lift? The curved top surface causes air to move faster over it, reducing pressure and creating lift What is the angle of attack? The angle between the chord line of the wing and the direction of the oncoming airflow What is the primary function of a propeller in an aircraft? To generate thrust by pushing air backwards 3 What happens when the angle of attack becomes too steep? The aircraft can stall due to a loss of lift How does an aircraft’s speed affect lift? Higher speeds generate more airflow over the wings, which increases lift What is the difference between drag and lift? Drag opposes the forward motion of the aircraft, while lift supports the aircraft in the air What are the two main components that affect the thrust in an aircraft? The engine and the propeller Why is it important to understand the relationship between weight and lift in aviation? To ensure the aircraft can maintain altitude and stability during flight What is the relationship between speed and drag? As speed increases, drag increases because more air resistance is encountered 4 What is the effect of reducing the weight of an aircraft? It reduces the amount of lift required to keep the aircraft in the air What is a stall in aviation? A condition where the angle of attack is too steep and the wing can no longer generate enough lift How do control surfaces on an aircraft affect flight? They allow pilots to control pitch, roll, and