ARMY SIFT AVIATION INFORMATION questions with correct answers 2023

ARMY SIFT AVIATION INFORMATION Newton's first law of motion - correct answer States that an object at rest will stay at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by an unbalanced force. The unbalanced force may be any force, such as gravity or friction. For example, a ball sitting on the floor will remain still unless a force is exerted upon it--a kick from a foot, a push from a hand, or a strong wind moving it. Newton's Second Law of Motion - correct answer States that when a body is acted upon by a constant force, its resulting acceleration is inversely proportional to the mass of the body and directly proportional to the applied force. Newton's Third Law of Motion - correct answer States that if two objects interact, the force exerted by the first object on the second object is equal in magnitude and opposite in the direction to the force exerted by the second object on the first object. For example, the force exerted by a tennis racket hitting a tennis ball is equal in magnitude and opposite the force exerted by the ball on the tennis racket. Likewise, during a launch of a rocket into space, the gases expelled under the rocket exert enough force to cause the rocket to lift off the launchpad in the opposite direction. Newton's Law of Universal Gravitation - correct answer States that a particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This law helps scientists understand the effects of gravity on aircraft during flight, because the gravitational force between two objects increases with mass and decreases with distance. Bernoulli's Principle - correct answer Within a horizontal flow of fluid, point of faster fluid speed will experience less pressure than points of slower fluid speed. The curvature of an airplane wing causes air to pass faster over the top of the wing (creating a lower pressure area) than under the wing (a higher pressure area). Four forces of flight - correct answer Weight, lift, thrust, drag Four types of friction - correct answer sliding, rolling, fluid, static Manufacturer's Empty Weight (MEW) - correct answer Total weight of the aircraft as it was built. This includes the system and components required for the aircraft to operate. It does not include the weight of baggage, passengers, or either usable or unusable fuel or fluids. Operating Empty Weight (OEW) - correct answer Is the MEW plus the weight of the crew, fluidsm unusable fuel, and the equipment required for flight. It does not include baggage, passengers, or usable fuel. All-Up (AUW) or Aircraft Gross Weight (AGW) - correct answer Is the total aircraft weight at any given moment during a flight. The AUW decreases as fuel and fluids are consumed during the operation of flight. Maximum Landing Weight (MLW) - correct answer Is an aircraft's weight limit for landing. Exceeding this weight increases stress on the landing grear and may affect the distance required for a safe landing. Maximum Zero Fuel Weight (MZFW) - correct answer Is the permissible weight of an aircraft with its contents and includes unusable fuel. The total MZFW excludes the weight of usable fuel on board and any consumable fluids. Maximum Takeoff Weight (MTOW) - correct answer Is an aircraft's weight limit for takeoff. Exceeding this limit increases the power required for takeoff, lengthens the runway distance needed for a successful lift off, and places excess stress on the aircraft structure. Maximum Ramp Weight (MRW) - correct answer Is the weight limit for an aircraft to taxi or be towed on the ground. The Flight Envelope - correct answer Encompasses the limits of speed, altitude, and angle of attack required by any aircraft to maintain a stable flight. An incorrect combination of these factors may result in a stall, during which the aircraft experiences a decrease in lift and a reduction in airspeed. The Angle of Attack (AOA), Chord - correct answer Is the angle between the direction of the airflow against the wind and the ______, an imaginary reference line that extends from the leading edge to the trailing edge of the wing.