Beginner's Guide
to Aerodynamics
Density and Lift Activity
Open the slide called
Air Density and study the examples.
Next, open the slide called Momentum
Effects. Look at the very bottom of the page, noting how changes in
density affect the lift.
Note: For
Density Problems, use the formula D=M/V
For problems
14, use the mass and volume given to find the density of the column of
air.
(1) Mass
= 10 kg & Volume = 8m^{3}
Density
=_________
(2) Mass = 15 kg
& Volume = 10m^{3}
Density
= _________
(3) Mass = 5 kg
& Volume = 2m x 2m x 2m (Hint: You first need to calculate the volume!)
Density
= _________
(4) Mass = 35 kg
& Volume = 3m x 3m x 3m
Density
= _________
Now answer the
following questions.
(5) Looking
at your answers above, which density will produce the greatest amount
of lift?
(6) Which will produce
the least amount of lift?
(7) Given your answers
to Problems 5 & 6 above, briefly state what effect the density of
the air has on the lift of an airplane.
