Lesson 1.2 Vocab Flashcards
Forces
A push or pull upon an object resulting from the object’s interaction with another object.
Fluids
A gas or liquid that tends to take up the shape of its container.
Unbalanced Force
Forces that are directed opposite each other are not equal in magnitude
Gravity
The force that attracts a body toward the center of the earth or toward any other physical body having mass.
Acceleration
The rate at which an object speeds up, slows down, or changes direction.
Mass
The amount of matter in a object. Not to be confused with weight, which is the amount of force that gravity exerts on an object.
Magnitude
The size or quantity of something.
Lift
The force that directly opposes the weight of an aircraft and hols the aircraft in the air. In a rocket, lift and thrust are in the same direction.
Weight
The force of gravity that pulls objects downward. Not to be confused with mass, the amount of matter in an object.
Density altitude
The density of air, which varies at different altitudes. The higher the altitude, the less dense the air is.
Payload
The weight of occupants, cargo, and baggage on board an aircraft.
Thrust
A force applied to a body to propel it in a desired direction. The force which moves an aircraft or rocket.
Propels
To drive, or cause to move, forward.
Drag
Resistance of air against the forward movement of an airplane or rocket.
Propulsion
The means by which aircraft and spacecraft are pushed forward.
