The idea is pretty simple and there s lots of variations.
Rubber band catapult designs.
When a rubber band is stretched its potential energy increases.
A juice bottle lid or similar object to use as an ammunition basket.
12 dowel rods i used pre cut 12 and 3 8 diameter dowel rods that i found at hobby lobby.
When it is released it snaps back kinetic energy and its potential energy returns to zero.
Wait for some time until the glue dries.
Catapult with popsicle sticks rubber bands and bottle cap this popsicle stick catapult design is very similar to the one above except you are replacing the spoon with the bottle cap.
Push the small container into the glue.
Potential energy can come from gravity but also from elasticity such as a rubber band.
Engineers must understand both potential and kinetic energy.
In this session you will learn how to make a catapult at home.
When the tension is released by releasing the stretched rubber band the arm springs forward the energy is transformed from potential to kinetic and is then abruptly stopped by the stop block.
This prepares the students to use those same rubber bands in their model catapult design as they will be tweaking the distance the rubber band will be stretching and therefore the.
Catapult uses math and engineering to build the catapult using glue rubber bands and popsicle sticks.
This popsicle stick catapult design is an awesome.
The ideal place to tie the rubber band would be at 1 3 rd of the length of the popsicle sticks.
I figured that dowel rods might make a bigger and stronger catapult so we decided to do that instead of pencils.
Rubber bands to identify the specific spring constant k or stiffness of different rubber bands ccss math content 7 rpa 2.
A simple example is the design of a.
To make this catapult you will need.
Finally physics to talk about what happens and why when the catapult is activated.
Check out our interesting video on how to make a diy catapult with the rubber band.
Building a catapult design your way middle school curriculum mechanical engineering 236 potential energy is stored in the rubber band.
Your catapult is now ready.
Put hot glue over the topmost popsicle stick away from the rubber banded end.