14th Feb 15th and Feb. 16th, Joanne
plan 111‑Trebuchet project Activity‑ Class members build their own
catapults Have each of my 18 Tech Prep Math students design and build a rubber
band‑powered catapult. Original idea for the catapult was found on the
Internet at site http://andy.trebuchet.com/fun.htm
It was called
Crazy Catapult. Together with Mr. Stadnicki, head of Comp's Science Dept, the
Carpentry Dept developed building kits for my students using craft‑sticks,
wooden dowels, a wooden base, plastic spoon for the catapult's throwing arm
and rubber bands.
actual construction of catapults took 3 separate 45-minute periods. The
students really got involved in this project. Hammers were loud, and students
were helping each other. All 18 Tech Prep Math students completed their
project for a test grade. During the building and trying out of the models, we
discovered that by adding sand paper to the inside of the spoon's head the
distance that the launched penny traveled was increased.
increased distance was caused by the Fiction that the sand paper made between
the spoon and the penny. By holding the penny a second longer the penny could
be launched farther. A short discussion of friction was made.
the fourth 45 minute period we all went outside and held a competition tossing
pennies with our rubber‑band ‑powered catapults. When we held our
competition, each student had 2 trials. We measured distances the pennies
traveled in feet and we used stopwatches to time how long it took in seconds
for the pennies to land. The two top winners in my class had their pennies
travel 57 feet and 44 feet respectively.
Crazy Catapult Project
Original Site: pack o fun projects
Original Author: some staff writer, probably
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