and Crane
4th grade
February 8, 2007
Today's project was to make a conveyor belt.
You can move objects along the conveyor belt form one place to another.
In one minute they moved 30 objects.
Then they figured out the average seconds per object.
Last week's project was a crane. Next year's FLL challenge will be alternate energy.
So I tried to have the crane move by solar power.
It only worked in the sun light through the door and only at the steep angle.
The class room had no window so it could not be demonstrated there.
The conveyor belt was demonstrated for the whole class and they figured out the rate.
Also last's week group demonstrated the crane and the class estimated then figured out the number
of turns needed to raise the object completely
with one gear ratio and another that had triple the gear ratio.
