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Flashcards in #1 Deck (58)
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1

Define Speed

The rate at which an object moves.

2

Define Velocity

The speed of an object in a specified direction.

3

Is Speed a Scalar qualitiy?

Yes.

4

Describe Vectors

Can be dragrammatically summed to find a result

5

Define Force

Has a magnitude and direction

6

Define Newton's First Law

An object in space that is travelling at a constant speed will remain constant unless an external force is applied.

7

Define Newton's Second Law

If a force is applied to an object, the object will accelerate at a rate that is proportional to its mess and the force applied (F = ma).

8

Define Newton's Third Law

For every action, there is an equal and opposite reaction.

9

Define Energy

An objects capacity to do work

10

List the two types of energy

Kinetic and Potential

11

Define Kinetic Energy

The energy a body possess by virtue of it's motion

12

Define Potential Energy

The energy a body possess by virtue of its position in a force field

13

Define Gas

A group of molecules which are not bonded to each other

14

Define Gas Density

The quantity of particles in a unit of volume

15

What is the density of gas a function of?

Temperature and Pressure

16

List the four forces acting on an aircraft.

Lift, Weight, Thrust and Drag

17

Define Lift

The component of the total reaction which is perpendicular to the flight path of relative air flow.

18

Define Weight

The gravitational attraction to the Earth

19

Define Thrust

The propulsive force from a jet or propeller

20

Define Drag

The component of the total reaction that is parallel to the flight path

21

Define the Chord Line

A straight line joining the centres of curvature of the leading and trailling edges

22

Define Camber

The maximum distance between the mean camber line and the chord line, expressed as a percentage

23

Define Relative Air Flow

Oncoming wind

24

Define the Angle of Attack (AoA)

The angle difference between the chord line and relative air flow

25

Lift Formula

L = Co-efficient of Lift × 1/2 × Air Pressure (Rho [P]) × Velocity^2 × Surface of the wing

26

What is Lift Dependent Drag?

Induced drag through lift

27

Define Static stability

The initial reaction of an object after a force has been applied

28

Define Dynamic stability

The subsequent reaction of an object after a force has been applied

29

Define Stall

When the aircrafts Angle of Attack is greater than its critical angle (16 degrees)

30

Describe the effect of stall on an aircraft

A reduction in lift is accompanied by the breakdown of airflow over the wings