FORCES OF FLIGHT
Sectional Review
4 FORCES OF FLIGHT
Lift
Drag
Thrust
Weight
(Gravity x Mass)
4 FORCES OF FLIGHT
Lift
Drag
Thrust
Weight (Gravity x Mass)
WHAT’S ARE FORCES?
Gravity
 Weight
 Drag
 Lift
 Thrust
 Buoyancy

MASS AND WEIGHT
Mass
 The amount of Matter in a substance

Plain English – How much stuff is inside something
 Measured – kg or g (pounds for old fogies)
 Formula – Get on a Scale

Weight
 The Gravitational Pull on an Object




Plain English – How much does Gravity pull you on
the ground
Measured – N (Newtons)
Formula – Mass x Gravity
DENSITY
Associated with Mass
 Mass – How much stuff is in something

Density is one step beyond – it want to know how
big that something is.
 Density – How much stuff is inside of a given size
object

Measured – g/cm3 or kg/m3
 Formula – mass x volume

DENSITY
Density – Mass x Volume
 Mass – Measure on a Scale – g or kg


Volume – The 3D size of an object



Area – 2D size of an object – so it is just adding one
more side to the object
Length x Width = Area
Length x Width x Height = Volume
DENSITY OF AIR
 The
Hot Air inside the balloon makes
the air particles spread apart from
each other
 Since
the particles are over a bigger
volume it is less dense.
 Less
Dense Air Rises up
DENSITY
OF AIR
PARTICLES
DENSITY OF AIR
Gravity
Buoyancy
 Less
Dense Air Rises up
BERNOULLI’S PRINCIPLE
BERNOULLI’S PRINCIPLE
Air Pressure Travels from
High to Low
As Air speeds up it
loses pressure
BERNOULLI’S PRINCIPLE