Activity/Lab - We
began the day finally getting a chance to try out our hot air
balloons. The "launcher" heated the air inside the balloon ...
and since hot air is less dense than cold air, the balloon should
rise. Each balloon rose significantly -- some over five
stories high! Back inside, we collected data for use in a
position-time graph.
Trying out the launcher for the
first time.
Balloon name: Color
Blind.
Color Blind rose and began
to collapse mid-air!
Balloon name:
Hippie.
The Hippie
rose!
Balloon name: High
Flyer.
It rose and returned to earth 50
meters away from the launcher (it was clear which way the wind
was blowing).
Balloon name: Pink
Panther.
Pink Panther accelerated from
the launcher ...
.. and
rose!
Balloon name: The
Eye.
The Eye accelerated from the
launcher ...
.. and
rose!
Setting up data table and
distances.
Setting the Stomper car to high
speed ...
...placing the car at the start
line ...
... and collecting position and
time data.
Building
Project - We built balsa wood gliders today!
Shaping the balsa wood into an
airfoil.
Finish sanding the
wing.
Glueing and supporting the
dihedral wings.
Test flights
outside.
Gliders rose 2 to 3 stories high
and came back to the ground in a circular
path.