A push or a pull - Force, The measure of matter in an object (kg) - Mass, Change of velocity per unit time (m/s²). - Acceleration, A body continues in its state of rest or uniform motion unless acted on by an external force. - Newton's first law ( law of inertia), F = m × a → force equals mass times acceleration - Newton's second law, For every action, there is an equal and opposite reaction. - Newton's third law, A downward pulling force from Earth acting on mass. - Gravity, The forward force produced by engines that pushes aircraft ahead. - Thrust, Air resistance that slows down an aircraft’s forward motion. - Drag, An upward force created by wing shape (airfoil) that opposes gravity. - Lift, Winds blowing against the direction of flight, slowing the aircraft. - Headwind, Winds blowing in the same direction as flight, making the aircraft faster - Tailwind, A sideways wind that pushes an aircraft off course. - Crosswind, The grip between tires and road surfaces essential for vehicle control - Friction, Resistance between surfaces when at rest, preventing sliding. - Static Friction, Resistance between surfaces when moving, slowing objects down. - Kinetic Friction,

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