POF Definitions

Question 1

Mass

Answer 1

Measure of the amount of matter in an object (kg)

Question 2

Weight

Answer 2

The force that a mass exerts when in a gravitational field

Question 3

Newtons First Law

Answer 3

A body will remain at rest or in uniform motion unless acted upon by an external force

Question 4

Newtons second law

Answer 4

The acceleration of a body in a straight line is proportional to the applied force and inversely proportional to the mass of the body

Question 5

Newtons Third Law

Answer 5

To each and every action there is an equal and opposite reaction

Question 6

Speed

Answer 6

Change in distance over change in time

Question 7

Velocity

Answer 7

Indicating speed and direction

Question 8

Momentum

Answer 8

Product of mass and velocty

Question 9

Power

Answer 9

Rate of doing work, work over time

Question 10

Energy

Answer 10

The ability to do work

Question 11

Moment or Torque

Answer 11

Rotational acceleration

Question 12

Mass flow

Answer 12

The mass of air traveled through per second, Frontal area x speed x density

Question 13

Humidity

Answer 13

Measure of how much water vapour contained in the atmosphere

Question 14

Aerodynamic Force

Answer 14

Force exerted on a body by the air in which the body is immersed

Question 15

Static Pressure

Answer 15

Weight of the air molecules exerting a force per unit area

Question 16

Dynamic Pressure

Answer 16

The pressure of a fluid exerted on a body due to the motion of the object

Question 17

Total pressure

Answer 17

Sum of both static pressure and dynamic pressure

Question 18

IAS

Answer 18

Indicated airpseed, based on pressure reading from pitot tube and static pressure

Question 19

CAS

Answer 19

Calibrated airspeed, IAS corrected for instrument and position errors

Question 20

EAS

Answer 20

Equivalent airspeed, CAS corrected for compressibility of the air

Question 21

TAS

Answer 21

True air speed, EAS corrected for air density

Question 22

Coanda effect

Answer 22

Attachment of a fluid to a surface over a curve. Low pressure behind the theoretical separation point keeps the fluid attached

Question 23

Continuity Equation

Answer 23

Mass flow through a tube must remain constant

Question 24

Bernoullis Principle

Answer 24

In a flow of an ideal fluid, the sum of static pressure and kinetic energy per unit volume (dynamic pressure) remains constant

Question 25

Angle of attack

Answer 25

Angle between relative airflow and the chord line

Question 26

Total Reaction

Answer 26

Sum of the lift and drag vectors