POF Definitions Flashcards
Mass
Measure of the amount of matter in an object (kg)
Weight
The force that a mass exerts when in a gravitational field
Newtons First Law
A body will remain at rest or in uniform motion unless acted upon by an external force
Newtons second law
The acceleration of a body in a straight line is proportional to the applied force and inversely proportional to the mass of the body
Newtons Third Law
To each and every action there is an equal and opposite reaction
Speed
Change in distance over change in time
Velocity
Indicating speed and direction
Momentum
Product of mass and velocty
Power
Rate of doing work, work over time
Energy
The ability to do work
Moment or Torque
Rotational acceleration
Mass flow
The mass of air traveled through per second, Frontal area x speed x density
Humidity
Measure of how much water vapour contained in the atmosphere
Aerodynamic Force
Force exerted on a body by the air in which the body is immersed
Static Pressure
Weight of the air molecules exerting a force per unit area
Dynamic Pressure
The pressure of a fluid exerted on a body due to the motion of the object
Total pressure
Sum of both static pressure and dynamic pressure
IAS
Indicated airpseed, based on pressure reading from pitot tube and static pressure
CAS
Calibrated airspeed, IAS corrected for instrument and position errors
EAS
Equivalent airspeed, CAS corrected for compressibility of the air
TAS
True air speed, EAS corrected for air density
Coanda effect
Attachment of a fluid to a surface over a curve. Low pressure behind the theoretical separation point keeps the fluid attached
Continuity Equation
Mass flow through a tube must remain constant
Bernoullis Principle
In a flow of an ideal fluid, the sum of static pressure and kinetic energy per unit volume (dynamic pressure) remains constant
Angle of attack
Angle between relative airflow and the chord line
Total Reaction
Sum of the lift and drag vectors
