ARMY SIFT EXAM PRACTICE QUESTIONS
AND ANSWERS 100% PASS
Law of Inertia - ✔✔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.
Sliding or kinetic friction - ✔✔One object slides along the surface of another object
Fluid friction - ✔✔resistance on an object when it is moved through air, gas, or a fluid.
Ex. fish through water.
Rolling friction - ✔✔friction that occurs when an object rolls over a surface. Ex. when a
bowling ball rolls down and alley.
Static friction - ✔✔Friction that acts on objects that are not moving. Ex Tash can initially
stays in place due to static friction when an attempt is made to move it.
Newton's Second Law - ✔✔Force equals mass times acceleration. A body is acted upon
by a constant force its resulting acceleration is inversely proportional to the mass and
directly proportional to the applied force.
Newton's Third Law - ✔✔For every action there is an equal and opposite reaction
Newton's Law of Universal Gravitation - ✔✔Every object in the universe attracts every
other object
The force is directly proportional and their masses are inversely proportional to the
square of the distance between them.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Ex. if the distance is increased by 4 the force decreases by a factor of 16 (squared)
Bernoulli's Principle - ✔✔the rule that a stream of fast moving fluid exerts less pressure
than the surrounding fluid
Fluid Pressure according to Bernoulli principle - ✔✔Fluids moving at a point in a
horizontal pipe at a higher speed have lower pressure than fluids moving at a point at a
slower speed.
Four forces of flight - ✔✔lift, weight, thrust, and drag
Weight - ✔✔The force of gravity pushing the aircraft down
Lift - ✔✔the upward force required to lift the aircraft
Thrust - ✔✔The force applied in order to move the aircraft forward
Drag - ✔✔the force that slows the aircraft down in preparation for landing
Aircraft weight and balance - ✔✔must be calculated during preflight
Empty Weight Center of Gravity (EWCG) - ✔✔provided by the aircraft manufacture
along with a weight limit.
Manufacturer's Empty Weight (MEW) - ✔✔Total weight of the aircraft as it was built.
Operating Empty Weight (OEW) - ✔✔MEW plus the weight of the crew, fluids,
unusable fuel, and the equipment required for flight.
All-Up Weight (AUW) or Aircraft Gross Weight (AGW) - ✔✔Is the aircraft weight at
any given moment during flight. the AUW / AGW can decrease at any point during
flight.
Maximum Landing Weight (MLW) - ✔✔Aircraft's weight limit for landing, exceeding
the weight increases stress on landing gear
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
AND ANSWERS 100% PASS
Law of Inertia - ✔✔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.
Sliding or kinetic friction - ✔✔One object slides along the surface of another object
Fluid friction - ✔✔resistance on an object when it is moved through air, gas, or a fluid.
Ex. fish through water.
Rolling friction - ✔✔friction that occurs when an object rolls over a surface. Ex. when a
bowling ball rolls down and alley.
Static friction - ✔✔Friction that acts on objects that are not moving. Ex Tash can initially
stays in place due to static friction when an attempt is made to move it.
Newton's Second Law - ✔✔Force equals mass times acceleration. A body is acted upon
by a constant force its resulting acceleration is inversely proportional to the mass and
directly proportional to the applied force.
Newton's Third Law - ✔✔For every action there is an equal and opposite reaction
Newton's Law of Universal Gravitation - ✔✔Every object in the universe attracts every
other object
The force is directly proportional and their masses are inversely proportional to the
square of the distance between them.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Ex. if the distance is increased by 4 the force decreases by a factor of 16 (squared)
Bernoulli's Principle - ✔✔the rule that a stream of fast moving fluid exerts less pressure
than the surrounding fluid
Fluid Pressure according to Bernoulli principle - ✔✔Fluids moving at a point in a
horizontal pipe at a higher speed have lower pressure than fluids moving at a point at a
slower speed.
Four forces of flight - ✔✔lift, weight, thrust, and drag
Weight - ✔✔The force of gravity pushing the aircraft down
Lift - ✔✔the upward force required to lift the aircraft
Thrust - ✔✔The force applied in order to move the aircraft forward
Drag - ✔✔the force that slows the aircraft down in preparation for landing
Aircraft weight and balance - ✔✔must be calculated during preflight
Empty Weight Center of Gravity (EWCG) - ✔✔provided by the aircraft manufacture
along with a weight limit.
Manufacturer's Empty Weight (MEW) - ✔✔Total weight of the aircraft as it was built.
Operating Empty Weight (OEW) - ✔✔MEW plus the weight of the crew, fluids,
unusable fuel, and the equipment required for flight.
All-Up Weight (AUW) or Aircraft Gross Weight (AGW) - ✔✔Is the aircraft weight at
any given moment during flight. the AUW / AGW can decrease at any point during
flight.
Maximum Landing Weight (MLW) - ✔✔Aircraft's weight limit for landing, exceeding
the weight increases stress on landing gear
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
